We're talking about employment here. Masculine vs. feminine has nothing to do with job performance except in maybe porn or something.

If masculine men are preferred, then that means everyone else isn't. It's an obvious avenue for discrimination against women and LGBT people.

I'm a very masculine gay man (I'm just stating that as a fact, I'm not better than anyone else for it). I do know many more effeminate gay men. Things really are more difficult in the workplace for them especially, not jut in my experience, but empirically. I'm glad I don't have that affect because it makes my life easier, but biases like this can creep in and will always be damaging.