I took it to indicate that she believes that she is getting so much 'feedback' specifically because of what she is and what she's trying to do.
The fact that all of the people offering feedback were male is weak evidence in favour of this (consider that much of her immediate team is female). She offers as another piece of evidence that she compared notes with a colleague with a similar background who was male and who wasn't getting the same level of attention.
> Re: who cares if they were all male? If I open a PR and I get dozens of feedback, either they are legit feedback or not.
If you're working somewhere where you and people like you are getting 20 people peering over your shoulder uninvited and criticizing your every move and people of a different group only have 2 people reviewing their code then you can legitimately claim to be working in a hostile environment.
Code reviews are always a mixture of objective and subjective feedback, and having to consider detailed comments (objective, subjective, substantive, trivial) from a large number of people not directly involved and without appropriate context would be a stress on anyone (not to mention is a simple drain on productivity).
On a purely technical note, she says nowhere that the PRs should be dismissed because they were from men. I think that was something you read into it. At issue was the unusual quantity of the feedback.
> if a colleague would say "I am getting feedback from literally dozens of engineers (all of who were black women)", wouldn't that raise an eyebrow or more?
If it were fact, then I would assume that there was some way in which this colleague had upset a group of black women. I think a similar conclusion is being offered here (although given the likely employment ratios the black women theory would have a whole lot more evidence).