I can see why someone would object to the first one (I'm not 100% I agree with her emphasis on attitude, I don't think it's as simple as that) though I guess you could always answer "It doesn't", but what's wrong with the last two? People do get very narky when you suggest that maybe being white/straight etc gives them an advantage over people who aren't.

I'm genuinely curious: while I disagree with a lot of your opinions, they're always intelligently argued and interesting :)