The thing is that I don't disagree with this part. It's not a binary of absolutes -- and that's why I feel like the black-and-white attitude of "anyone who doesn't want unasked-for critique is a narcissistic jerk who's only looking for praise" is a misconception that harms the artistic community. : ( Sure, not everyone who offers critique is being a rude, insulting jerk! Usually they're well-meaning! But the behaviour of unsolicited critique is unintentionally presumptuous about what other artists "should" want.
I think artists should certainly strive to accept critique with grace and consider even the critique they didn't want to hear. But I also think the people offering critique would do well to ask, first, if the creator wants it, and not just assume that their opinions are so important that the creator should be grateful for them.
A lot of people have already brought up that many creators here are just relaxing or having fun, not specifically looking for critique. But I'll add that many artists who are serious about their art do appreciate critique, but don't really want to crowdsource it. Some want critique from a few peers or professionals that they trust, or from people familiar with the genre they're working in, and not from every skilled creator that has an opinion. This twitter thread put it pretty well.
Even Neil Gaiman's rules for writing mention seeking critique from "people who like the kind of thing that this is." Being selective in the critique you seek out is okay!
Some people are really hungry for useful critique, and absolutely, I think it's good to offer to those who are open to it!! I would LOVE to see more spaces for critique here -- it's something I genuinely enjoy or I wouldn't spend so much time on it. xD And in times when I've asked for critique on my own work, I super appreciated the people who took the time to tell me the things that didn't work for them -- it was extremely helpful for me as an artist!
The problem comes in when some creators assume that every good artist SHOULD be open for critique all the time -- which is why I say it's unsolicited (unasked for) critique that isn't always helpful. You might get lucky and critique someone who really wanted to hear it -- but imo it's better to ask and be sure!