I’m seeing a lot of advanced retail in US vending machines - inside airports. Food, electronics, cosmetics, all kinds of stuff.

This hints at the problem. Airports have improved security and you have to spend money on a plane ticket to enter so they don’t suffer the same dystopia as public spaces in the US which are trashed and destroyed by any asshole coming through who doesn’t give a shit, including the extremely impoverished and homeless which as a category includes many drugged up people, congenital criminals, and mentally ill. There are some over generalizations here about Americans all having no respect for others and this isn’t fair. Most are wonderful people. But enough Americans suck that it spoils the party for everyone, and broken window syndrome is a thing.