Most of this is just general "war is bad for everyone" and the old "the ones fighting the war aren't the one who want the war". It's true but it's also really nothing new or especially smart.

Look, I think I would just recommend do not send the flower of Ukrainian youth to die in trenches, whether he talks to Putin or not, just don’t do that

This part though is what I find problematic. This way of framing the current situation suggests a few things:

1. Ukraine is the one deciding for this war to happen
2. All that would be needed to stop this war would be talking with putin about a truce
3. Putin attacking Ukraine is sort of a "higher power" like a natural catastrophe that just has to be accepted

It also completely ignores a few things:

1. The lines are only this stable because Ukrainians risk and lose their lives every day to defend them. Stopping this would mean a truce would be no longer negotiable. Because why would Putin suddenly stop the efforts to move the lines once resistance has stopped?
2. Putin is the one responsible for Ukrainians going into this war and dying at the frontlines, just as he is responsible for the russian soldiers that are dying there

Also: Telling a nation to just roll over and be invaded is such an american thing to suggest.

Edit: This also misses the whole thing where other countries might accept you as a refugee if you desert the russian army, if you really didn't want to fight in this war.