If all of our aims are to become airline pilots then surely we should all be able to deal with different ATC/procedures/air space etc as part of our normal daily working lives. Unless of course some of us only want to be pilots flying around the UK which I would dare say would get pretty boring. Isn't it better to realise at an early stage during our training that the world is a big place with each country doing it's own thing to a certain extent and deal with it.
I personally love the US for this and am happy with saving some money along the way as well.