That's the extreme case, but there is also the less malicious one where because of stereotypes and average distributions at a particular company, people just assume women they are speaking to to be less technical than they are and try to 'helpfully' explain things at an unnecessarily basic level. Say, a system's engineer explaining their work to a female college as if she were a front end developer by default, where they would ask a male college what their experience was before making that assumption.
This is an easy mistake to make if you are a kernel hacker in an organization that has, say 20% female developers overall, but where only 2% of kernel hackers are women. Easy to make, not malicious, but not much less annoying because of it, specially if you are the 10th person to assume that. From your point of view, it is a very efficient cache prediction strategy, since you'll get it right 90% of the time[1], but from theirs, it means half their queries end up miss-predicted...
[1] Yes, I am assuming 50% of all developers are kernel hackers, you can switch to something more realistic like product vs infra, front vs backend, etc. Also, the point is not about "lower-level systems programming being real-er programming!", but about making assumptions based partly on gender.