What else is in the Teaches of Peaches?

Last month, in Newsweek, Ramin Setodeh argued that gay actors just can't play straight roles because all that gayness just shines through and distracts us from their performance.
This horse crap again? According to this theory:

Laurence Fishburne can't play Morpheus because his 'still inside the Matrixosity' shatters the image.
Sir Ian McKellan can't play Magneto because of his lack of megalomaniacal desire to control the world. And also his disturbing lack of mutant powers.
Colin Firth can't play Mister Darcy because of his intrusive twentieth centuryness.
Laurence Olivier, due to his lack of being king, can't play Henry V.

Of course, there's the problem with Ben Stiller, but that's because he can't act and not because he is or isn't gay.

Actors play people who aren't them. THIS IS THEIR JOB.
If you can't get over the fact that you know an actor is gay? That's not a flaw in their acting abilities.