MissT - The reason why a proportion of gay people make an issue of bring proud of their orientation, is because they have grown up in a culture that has gone to considerable lengths to make them ashamed of it.
Liaisons between consenting males were only made legal a few decades ago.
The reason why you, and I, don't need to be 'proud' of our orientation, is because we are fortunate enough to have been born into a society that takes the way we are, and the people we love, completely for granted.
We have never encountered prejudice and violence for being who we are, and we should be very grateful for that.
The entertainment industry has always been a haven of acceptance for gay people, even though they had to be very discreet until the law changed.
Fortunately, as a society, we are slowly moving towards more tolerance and less fear of people who are different from us.
But until acceptance is simply standard, a proportion of gay people will ensure that they wear their pride and refusal to be intimidated or ostracised, publicly.
It may not suit everyone's ideas of behaviour, but that is the reason for it.