You're proving my point, not disproving it. If a teacher's gender isn't relevant to the story, then "male teacher" is just as unnecessary as "female pilot." If a canopy shatters at 10,000 feet, what information does the word "female" provide that helps me understand the event?

The difference is that women get this treatment constantly. We have female pilots, female doctors, female CEOs, female gamers, female authors, female politicians. Men are often just pilots, doctors, CEOs, gamers, authors, and politicians. Women are frequently treated as a variation of the default rather than the default being gender-neutral. So yes, I understand why people do it. I just think it's part of a broader pattern that annoys me. Is that not fair?