I doubt it is sexism, HN tends to be fairly equal in its pointless bikeshedding
https://news.ycombinator.com/item?id=18093145
https://news.ycombinator.com/item?id=19636499
And I've seen comments along these lines on Colin Furze's builds. Among others, mostly men.
It seems explicitly sexist to leap to the defense of female creators in this way. Why not just assume they can handle the criticism, just as well as males can, and don't need anyone defending them?