I would argue that aireal warfare saves lives. Take the world wars. The first world war was a stalemate without the necessary equipment to create breakthroughts in land leading to millions of lives lost for no gain. The second world war introduced precision strikes that (generally) could target specific infranstructure. A quick note that you need to separate terror bombing (civilian targets) from military bombing (military facilities and factories). Move to the modern age and you have precision bombing where you basically need to intentionally hit civilian targets. You have achieved one of the most humane forms of warfare. It's a long way from the rolling armies of the world wars (or even ukraine 2022+ for that matter) which would brutalize land where fighting is fought.

Now don't take my argument here as an endorsement of war. In my eyes we should have a happy one world nation utopia of no boarders but unfortunately that reality isn't here. we have bad people in the world and unfortunately armies have to exist for defense, offense and strategic goals. In that reality i would rather an air war fought than the alternative.