This surprises me. You sound like you’ve never travelled abroad and experienced other cultures. I’m sure you have but I’m stunned they haven’t even touched you.I guess it depends what people are interested too.
No disprespect to some overseas places but I think I would find them a cultural desert.
To me the UK for its geographic size has the greatest variety of things to do and visit in the World. Where in the World would you find a major Salvador Dali and El Greco paintings in a place like Bishop Auckland?
Just look at the football leagues - is there anything quite the same in the World looking at the number of professional clubs and the depth of competitiveness. All overseas managers comment on it when they come the England in particular.
I am surprised posters think the UK is oppressive, to me there is great freedom here that you can say almost what you like and London must be the most cosmopolitan city in the World.
When the Aussie Government had the £10 Pom scheme running - around one third of Brits came back to live even though they had to pay their own expensive fare back.
I would not put people off trying it and of course many on here have benefitted from moving away from Teesside because of the greater employment opportunities overseas and elsewhere in the UK.