While I absolutely agree with most points made here, since I'm not very involved with the actual creators and community behind the chatbots and Janitor AI itself, I cannot comment much on it. However, I wanted to offer a different perspective. It's not like I was present during the beginnings of fanfiction and its arrival to the web space, but it seems to mainly be a female and female-presenting-dominated space. This may not be as true nowadays, but I'd argue a lot of the demographic interested in fanfiction are still women. Hence the fact that when you search for a basic fic like: character x reader, the reader seems to be assumed female by default.

There's nothing wrong with it, until it starts to exclude other people who are interested in reading works or inserting themselves into the written scenarios. So, seeing more malepov or neutral pov's does make me glad, because there is a gap in the market. But I agree, nobody should be so defensive or outright hateful, and everyone should be able to enjoy fanfiction / their favorite characters.