1. It’s a sport (huh? )
Like it or no, figure skating is, above all, a sport. Which means it is evaluated in terms of the Olympic motto, "faster, higher, stronger", and not "who is the pretties one". The artistry is quite commonly brought as argument to "raise the age limit", so it is surprising people don't see why this is questioned.
2. Skaters will practice it anyway (so, I can’t be responsible if someone ignores the rules

)
SO, wait. The rule is "only 17+ can skate in seniors" or any other age cap. There is literally no rule forbidding skaters from training quads or doing them in competition before they reach seniors. Would you be so kind to explain specifically what rules protect juniors from training quads? Why they would suddenly not train them just like Trusova, Valieva, Liu didnt train them as juniors wink wink
3. Young skaters are pushing the sport forward, with jumps (I reject that jumps are the only way to “push the sport forward”. In any event, if they are, let them push the sport forward at 16)
This is one of those "i made it up and then i got offended". Noone here, except fr you, is stating that the jumps are the ONLY way to push the sport forward.
Now, if you believe that jumps are NOT pushing the SPORT forward, please do explain.
4. Watch ice dance or exhibitions (huh? No, I like to watch men’s singles, thank you very much for your advice

)
Again, most people who argue for an age limit state that they dont want to see jumps, they want to see artistry. Watching ice dance or shows sounds like a sensible suggestion for those people, as there will be much more artistry in ice dance than in singles, always.
5. You are just prejudiced against skater X. (Huh? Show me where I have not consistently supported this rule for all skaters from all countries)
Again, maybe this is not your case personally, but quite a few people who defend age increase are quite prejudiced, and support are increase basically because it is not their favourites winning. Example: Kihira has same age as Zagitova. Did we hear people complaining that age should be raised because Kihira is damaging her health jumping triple axes left and right? Nope
But of course, its easier to play drinking games than to actually present reasons.