2019 was the weakest pairs field at worlds in 6 years...Aliona retired, meaghen and Eric retired, only 2 Chinese teams, one of the Russian teams had just come up from juniors...the tenth place german team scored 178.66 so in essence any US pair in the 6 at nationals could have achieved a score higher then 178.66 it wasn't a magnificent achievement.
LOL, then I guess you think, oh it was just a piece-of-cake for Ash & Timothy. Yeah, right. Such unfortunate disrespect has cropped up in this thread.
FYI: At 2019 Worlds, Ash/Timothy scored a total of 193.81, just over 15 points higher than the 178.66 by the 10th place team, Ziegler/Kiefer. Yet, Ash/Timothy had scored 212.36 at U.S. Nationals. Trying to compare stats and performances between skaters among different competitions isn't a good way to predict any outcomes. Just because the top 6 pair team scores at 2019 U.S. Nationals were higher than 178.66, does NOT mean those scores were directly transferrable by any of those teams to a Worlds competition! Hypotheticals are always useless ya know. It wasn't just 'any U.S. pair in the top 6 at Nationals' who went to Worlds in 2019, it was Cain-Gribble/LeDuc who earned their spot, represented and competed well, and most of all, obtained invaluable experience. That said, let's further analyze what you rapped off so disrespectfully:
en.wikipedia.org
Ash/Timothy were the strongest pair team in the top 6 at Nationals in 2019. That's why they won. Possibly, Kayne/O'Shea were favored as they were in first after the short and they had a great fp in
Swan Lake. But the fluke botch on K/O's last lift happened, and they fell to 4th place. Possibly,
K/O might have fared well at 2019 Worlds had that not happened and they'd won Nationals.
Still, in assessing K/O's overall talent: less than good speed; not a good twist; not a lot of pop on money elements, though their lifts were good and they had a lot of heart and desire. A big drawback, which is one reason why K/O lacked speed: Tarah has always needed to improve her skating skills.
That post-Olympics season, the most talented and internationally well known U.S. team, the Knierims, had made a lot of changes in order to raise their level. But things hadn't fully worked out with the risk they took to be coached by Aliona Savchenko. So the Knierims had a lot of sorting out prior to Nationals, even despite having some fairly interesting programs in which they were showing some improvements. The bigger issue is that
Chris had a wrist or hand injury, so the Knierims ironically weren't even in the top 6 at Nationals. They
had landed in 7th that year, which even then was a gift placement based on the problems with Chris' injury.
Denney/Frazier had a good season in 2018 - 2019, and they were strong second place finishers to Ash/Timothy at Nationals. However, as we know, Haven still had liabilities with her jump issues related to her knee injury. So, there was
no guarantee D/F would have fared particularly well at 2019 Worlds had they won Nationals. In fact, D/F had struggled at Worlds in 2017 because that was the first season of their comeback from Haven's knee injury. The 3rd place team at Nationals in 2019: Stellato/Bartholomay were a good team with grand ambitions. S/B tended to be given the short end of the stick though, so in light of politics, and in view of their reach being somewhat greater than their grasp, no matter how well S/B performed, had they won the opportunity to go to Worlds in 2019, I don't think they would have necessarily gotten the respect and the points needed to win back 2 spots. Plus, Nate was injured and they ended up splitting.
Witness how well S/B performed in the sp at 2018 Worlds as the alternates to K/O who had to withdraw, and yet S/B were dumped on in the scoring and didn't make the fp cut.
S/B didn't have the same international experience and exposure with the strong comparative results of Ash/Timothy, who had a great start when they first partnered. Ash/ Timothy were sent to a lot of senior Bs in their debut season (2016 - 2017), and they performed very well. Ash/Timothy won bronze at Golden Spin; placed 4th at Finlandia; 4th at Nebelhorn; and 9th at 4CCs.
In their debut season and first appearance at 2019 U.S. Nationals, Jessica/Brian surprised themselves and everyone else by placing fifth. They looked very good together right off the bat, so it was an impressive debut. However, in terms of your claim:
C/J going to 2019 Worlds and scoring above some other veteran second tier international teams: I don't think so. Not because they don't have or didn't have talent then, or couldn't have stacked up well against some second tier teams in 2019. It's just the politics of the situation, combined with their lack of competitive experience as new partners at that point. For them, it was a bonus and a promise of better things to come just placing 5th at 2019 U.S. Nationals.
The 6th place team at 2019 U.S. Nationals,
Lu/Mitrofanov, are and were very talented, but they were still young and growing as a team. It's
doubtful they would have been placed ahead of many 2nd-tier veteran international teams with a score over 178+ simply because they scored 182+ at 2019 U.S. Nationals. A moot point too since realistically, L/M would never have been placed in first over all of the top U.S. veteran teams that year.
One important thing this rundown brings to mind is that figure skating tends to mostly be a crapshoot the way competitions are structured, and the way the sport is scored. Politics are a huge factor, and too few competitive opportunities often hampers the ability of skaters to gain growth experience. U.S. pairs figure skating is very strong, and it's becoming stronger. Skaters simply need the chance to compete and to hone their talent and experience at a variety of competitions.
FYI: The entire international pairs landscape has changed, and there's no going back. It doesn't matter who competes or who doesn't at any given competition. Things are always changing in sport and in life, in case you didn't realize that! Living life, and also competing as a top level athlete is about going on your own personal journey and doing the best you can, and learning from every experience and never giving up. That's the most anyone can ask of themselves.