If Ukrainians don’t fight, they will just be taken by Russia to fight in the next war after they are conquered, just like the Chechens are being used to fight Ukrainians today.
So they will be dying in war either way, the only question is if they will die fighting against Russia or fighting against another innocent country that Russia wants to conquer next.
Moldova, then Latvia, Lithuania, Estonia, then Poland. Each population being genocided in the war against the next, just like Chechens are today in Ukraine.