because it can take a whole load of your mind basically, and you don't have to live with hiding it from the press all the time or from anybody else
I think the whole cloak and dagger just makes the whole thing worse people don't go around to the press saying "Hi guys just want to let you all know I am straight yes I know...your all surprised what can I say I like women". They don't say that they just go about doing their own thing.
Personally I just think they should go and have ***/partnerships with whoever (consensual of course) they want. If the press asks them questions a simple "yes I am what's them problem?" will do, the whole 'having to come out' just dramatises the whole thing and it would be smoother and viewed normal if people just treated their sexuality as normal.