Actually fighting for your life doesn't bestow any superhuman powers. Russians there are fighting for their lives too. There's enough videos of people in Ukraine being killed by $1000 drones, $100 landmines, and 50 cent bullets.

It's just the way war has always turned. Battleships were obsoleted by airplanes 1/1000th their cost. Machineguns and trenches ended cavalry. Arms companies still profit in war and people still die in them, doesn't matter what an individual gun or missile costs.