To train AI, you want contents that are human generated. So since Google is interested in the AI race now, filtering out AI contents is high on its list of priority. We are lucky it "trickles down" into us in this form.

Otherwise, Google being Google would ignore this issue just as they have ignored all the SEO and bot spams in the past. They lost their visions and has succumbed fully to corporatitis. I think anything short of a major surgery or blood transfusion would save Google now.