When I read this, I thought to myself, this is probably the one person on every project that basically finds some irrational reason to reject basically any idea.

"It came from a woman" is one of the most irrational reasons I can imagine, but such a person also probably applies countless prejudices with no basis.

And this behavior is probably tolerated because some people on the project feel they can't get by without this person, which leads to subtle social cues that continue to fuel this behavior.