You should read the replies to that tweet:

https://twitter.com/keccers/status/1596324554095595521

https://twitter.com/robinkunde/status/1596325433653559298

It is very common for American schools to have student art shows.

I don't know where you get your perception of the US from, but it sure isn't reality. Your other two "observations" are similarly divorced from the real world.