There's a great book "if only they didn't speak English" about just how different the culture is between America and England. There is genuinely such a huge cultural divide that most people just never consider.
https://www.amazon.co.uk/Only-They-Didnt-Speak-English/dp/1785942263
Strongly reccomend it if this kind of difference has taken your interest!
Apart from us watching a lot of US media you’re mostly wrong. Jon Sopel wrote a book on the topic “If Only They Didn't Speak English”, it's well worth a read.