What I'm getting at is that liberals know "historically marginalized" people are worthless employees.

So to change their minds it's not going to work to show them those people are just overhead because they know that already.

Like other things they've never thought about any consequences after the first, most superficial step. Redistribute wealth to "historically marginalized groups" - ok, they believe that's good thing. That they're infecting the company with corporate aids or that lowering the bar doesn't make people perform better has never even occurred to them.