What you see online does not reflect reality.
First of all, the entirety of what is online only reflects the views of the sort of people who post their opinions online. Vast swathes of the population do not do this, preferring to live in the physical world.
And secondly, you aren't even seeing a broad picture of the range of views that are online. On whatever platforms you use, the algorithm will show you whatever it has worked out you want to see and are likely to engage with. In this case, it's showing you other people repeating the same old, uninformed, misogynistic crap about JK Rowling, encouraging you all to pat each other on the back for all sharing the same, "correct" views.
Obviously I understand the point you are making about AI reproducing content that it finds online. But this means that the kind of content it picks up is skewed towards the kind of content posted by the terminally online.
I used to be part of an online parenting community where I was the only Brit and almost all the others were American. Over a period of a few months I started to find them increasingly tiresome and was trying to think of a way of politely leaving the group without fanfare. Then one day they all started slagging off JK Rowling and I politely said I disagreed and attempted to "educate" them about a few things. For example, they all kept saying she was far right. Only someone who literally does not have a single clue about British politics and where JK Rowling is positioned on the British political spectrum could be capable of saying something so stupid, but they all actually appeared to believe this. So I politely explained a few things to them and was unceremoniously booted out of the group. Which at least resolved my dilemma of how to leave without offending anyone.
My time among them was an interesting social experiment for me. 50 educated women who feel so threatened by different points of view that they will literally expel a woman who agrees with them about many things but has a different opinion about one thing, but somehow believe that they are the ones NOT living in an echo chamber. I find that astounding. I mean, if you refuse to even talk to someone who doesn't already agree with you about everything, how on earth do you think you are ever going to bring people round to your way of thinking, or ever effect any kind of political change? And then you act so surprised when Trump gets re-elected, like you didn't see it coming? Well, maybe you would have seen it coming if you spent any time at all talking to people who aren't exactly like you.
The funniest part was that they were all piling on to tell me that I don't know anything about feminism. I mean, you live in a country where women are struggling to access contraception and safe and legal abortions, the only country in the entire developed world where women don't have a legal right to paid maternity leave, and you're telling me I'm not feministing correctly? Kindly, ma'am, go fuck yourself. If "feminists" in America were a little more JK Rowling and a lot less Judith Butler, perhaps women in America wouldn't lack basic rights that women in most of the rest of the world take for granted. Just a thought.
I came away with the lasting impression that the reason America is so utterly fucked is because it is a country where the supposedly educated and intelligent people who vote Democrat are in many ways even more stupid, bigoted and narrow-minded than the obviously stupid, bigoted and narrow-minded ones who vote Trump and love their guns more than they love their children not getting shot at school.