Because Gays control the entire entertainment industry.
It's impossible if gayness is a natural, genetic property. There are no genes for controlling the entertainment industry. Gays would be equally spread among all industries and all walks of life.
I can even understand if gays are more artistic, more touchy-feely, and that makes them good actors. But the entertainment industry is not controlled by actors. It is controlled by businessmen. Why would they be gay, but managers of other industries wouldn't?
On the other hand, if gay behavior is a choice then definitely it makes sense. Once an executive enters the gay atmosphere he either embraces it and becomes one of them, with great career perspectives, or rejects it... and has to look for a job elsewhere.