I don't think we choose our sexual preference. I certainly didn't choose mine, and I don't know of anyone who has. It's pretty much predetermined by genetics and maybe influenced by life experiences as to whether we feel free to be ourselves. Not a choice though.
Plenty of people choose to have sex with someone outside of their sexual preference. There's lots of gay people who pass as straight with varying degrees of success. I'll bet there's lots of gay gals on this site who provide for men because of the financial benefit. But that is a choice, and their choice whether to do that or not is worthy of our respect. We can't live other people's lives for them.
But I think that if you go back and read the OP's comments, he hasn't actually tried to shame anyone. He comes off as just trying to understand, and maybe to persuade people that not all AA men are what they might assume them to be.
But we all believe what we want to believe and see what we want to see. I don't expect to change anyone's mind, just maybe correct a misunderstanding.
If people are unwilling to have sex with an AA man because of what other people might think, then there might be an inferiority complex at play. I don't think that means that everyone who decides not to have sex with an AA man has an inferiority complex, just maybe that one circumstance.
Then again, it might just be a marketing decision plain and simple. We don't know why people make the choices they make unless we ask them and they are willing to tell us.