Because people in britain LIKE BRITAIN. It's not because of the fact that they've analyzed all the countries in the world and they have come to the rational conclusion that, yes, actually - Britain
is the best. It's for the, justifiably unapologetic, bias that we favour it
because it's the country we live in.
It's for the same reason that most english football fans will
generally tend to support england at football, and the scottish scotland, etc.
They don't cheer on brazil because actually, those brazilians do a damn fine job of kicking the ball into the net and why should we be precious about where we get our football from?
I can't speak for anybody else, but also, for me, personally - it's for the same reason that I couldn't give THAT much of a toss WHAT goes on abroad. News articles, TV programmes, books, etc. are immediately diminished to at most 50% the interest level they would have been otherwise if they are solely about something going off in some other country, than if they are in britain about somebody I can relate to.
People can't identify with Mrs Woo in a far off land with her weird life. She'd probably rather be out in the sun anyway, picking rice and mudpacking and living the simple life like she used to before she was rounded up and sent to a bike factory. Imagine it - one minute you're tending to the farm with all your lovely hand reared chickens fluttering around the place enjoying the sunshine, the next you're sitting on a production line being bollocked because some silly bit of carbon isn't in precisely the right place.