This is the Internet, where you take whatever feedback you get with the appropriate grain of salt and either choose to improve or not. Most people on the public venues on the Internet - forums, blogs, comments, essays - are not looking to build relationships or establish trust. (There are some exceptions - I've made some great friendships with Internet friends - but they're usually more private niche forums than blogs or other publications with a wide readership.) They're looking to get their opinion out there, build a readership, perhaps influence public discourse, and maybe get some feedback on their ideas.

I've seen similar comments leveled at PG [1] and Zed Shaw [2], so I don't think it's just sexism.

[1] https://idlewords.com/2005/04/dabblers_and_blowhards.htm

[2] https://news.ycombinator.com/item?id=9275526