How come there aren't a lot of lesbian actresses and gay actors out there ?

Especially not a lot of black gay/lesbians actors/actresses either? Does the media mostly and only want straight ones and homosexuals aren’t totally accepted in the media? The only time you may see a lot of gay actors and lesbian actresses are featured in porn episodes.The only ones I see actually on television or in movies just the only shows as one cast member from the other charaters,the series The L Word, Felicia “Snoop” Pearson from the HBO series The Wire, and so on which is very few to me.