I mean, it's a part of globalization, but I would argue that being able to skip most of the parts of the globe you don't want to deal with by traveling many miles above it isn't really helping with having an understanding of the world. It's another topic altogether what you do once you get there, but if it's just to vacation, then: :shrug:.

And cause global issues while you're at it. No, it would be a net positive for the world and the environment for sure.

Or maybe we want to keep the peace induced through learning about different cultures via cheap travel. Maybe building dams is cheaper than recovering from a world war three.