>> ... or "airline industry is fucked" because pilots pick up stewardesses.

You're right. They don't for the reason you mentioned. They do it for worse things:

http://www.westword.com/news/frontier-airlines-subject-of-ge...

https://bossip.com/1365175/another-one-second-black-female-d...

https://www.change.org/p/stop-the-bullying-intimidation-and-...