I have been making physical art myself since I could walk pretty much, and I have never once heard of anyone with similar interests evwn mention making stickers for a living. Maybe it's a geographical thing? I know some where making postcards and selling them on the streets for some beer money, while others kissed who ever ass they needed to in order to have gallery shows and establish themselves in the disgusting art world and make a decent living of their art.. But never stickers. I never bothered with trying to make money off it myself, I enjoy painting and making money from it has never crossed my mind.
I'm not saying that you're wrong, just to make that clear. But given how people will literally refuse to even touch anything that's been made with AI these days (gaming industry for example), I personally feel that the loud minorities of this online activism of "AI stealing creative work" is digital artists who only have grown their fanbase by a lot from slapping a "human made" note on their work, rather than having their livelihood snatched because of a Ghibli or a Disney generator available online.