This isn't a gift to Hillary, or a matter of fairness between her and Trump. It's an evaluation of her qualities on another (largely before-unseen) metric. If pure sexism got us better presidents the sexist decision would be the right one, but as you'll see, it isn't actually sexist.

Imagine yourself as a sport team leader. You've normally picked large bruiser types and you say "Hmmm, I should try a lighter person with better speed." You don't know it'll work out, and it's "unfair" to the big bruisers, but it's a rational thing for a team leader to do.

Considering that left-handed players often get a benefit from simply being unique, choosing a female president could pay out now even if in the long run there's no real difference.