I see variations on this phrase all over the place, and I don't understand it. It really isn't that hard to avoid saying offensive and distasteful things to women (or anyone else, actually). It's almost always obvious that some statements are pretty offensive or at the very least make people uncomfortable, and it only takes the smallest modicum of common sense and tact to avoid saying those things. "You're too hot to be an engineer" is an awkward thing to say to a woman in an elevator, and if you're a woman in tech, you're bombarded with those statements weekly. It's not about being brittle. It's about letting people know when what they're saying is garbage. If anything, the men complaining about how they don't like having to think before speaking are brittle.
Speaking as a man that manages to "navigate the PC minefield" every day, it really isn't difficult. I promise.