Earlier quoted context omitted.
The argument for diversity is that by not actively working for diversity, we will reflexively hire people like ourselves, which for the most part are white males. In addition, we are talking about groups which have been historically discriminated against. Affirmative action is about fairness (of opportunity), more so than goodness (for the company).
I think that's a solid argument, but shouldn't the goal be to hire based on merit, not "hire people like ourselves" or "try to avoid hiring people like ourselves by erring towards hiring people not like ourselves"? I think blinding as much as possible in the interview process is fairer and, in the long run, simpler for everyone involved.
The "but we want to hire on merit" argument is clearly fucking bullshit if you've ever had any involvement in recruitment and seen how flawed it is.