First of all, calm down. It’s just a competition.I get your reasoning but I disagree. I would say that the last 3 World Champs in both women/men are cuddled by their federations.
Kaori has been a bit shaky this season and she had a bad GPF, but she still managed to win nationals. What is there to lose? NOT sending Kaori to 4CC is just a condescending move to the whole competition imo. Same goes for Yuma.
And I don't understand at all what the Americans are thinking. This B team in men here at 4CC is just sad. I get why Maxim didn't come, but Ilia and Andrew has no excuse. And why didn't Amber come? She's had a great season, why not go for it? Again, a condescending move to the whole competition.
And how can they choose Isabeau and Jason for Worlds? When they have proved nothing this season. And they didn't even compete at nationals!! That's cuddling big time. And I suspect that is not about sending the best skater, it is more about the money these cuddled skaters can bring in.
This mess is NOT helping the figure skating sport at all.
This diva behaviour can also be found in Russia where it has occured that some skaters (hmmm...Medvedeva etc) has skipped nationals because of 'reasons', and then later on competed at Europeans/Worlds. But the Russian diva behaviour is of a completely different nature, they are just super scared of being beaten at nationals! But they would throw themselves at any international competition if they have the chance.
Second, the word is “coddled,” not cuddled.
Third, Isabeau did do well in her GP event before she was injured. The US men have proven time and again why Jason is the safe bet. This Worlds determines Olympic Spots. The US fed is sending the skaters most likely to secure spots for Team USA.
Finally, I don’t know how you can call any of these skaters divas. They are elite athletes who know how to strategize. Four C’s has never been seen as prestigious as Europeans, involves significant travel, and is too close to Worlds. I assume these elite athletes know what they are doing.

But it is a valid question. Why did Canada send the ones they did?