"Hiring because someone is <insert underrepresented group here>" isn't the goal, IMO, and I think it sounds like your sister's career advisor did her a disservice by describing it that way. I also don't think her career advisor's POV is true, FWIW.
As a woman in STEM, I don't want someone to hire me just because I'm a woman. I want someone to 1) think I'm awesome at what I do, and 2) by the way I happen to be a woman. But I also think it's true that if 2) is a fact about you, it's harder for you to prove 1) than it would be otherwise, and that's not right. My belief is that the reason for encouraging diversity initiatives are that there are lots of talented women (and other minority groups) out there who are being overlooked but deserve to get noticed and hired, and the goal is always to surface talented people to hire, women or otherwise.
As a woman in STEM, I don't want someone to hire me just because I'm a woman. I want someone to 1) think I'm awesome at what I do, and 2) by the way I happen to be a woman. But I also think it's true that if 2) is a fact about you, it's harder for you to prove 1) than it would be otherwise, and that's not right. My belief is that the reason for encouraging diversity initiatives are that there are lots of talented women (and other minority groups) out there who are being overlooked but deserve to get noticed and hired, and the goal is always to surface talented people to hire, women or otherwise.