"content creator" is a separate category of for-profit online media. As it's designed for mass consumption, the content creators moved off the open web a long time ago to sharecrop on BigCorp's platforms: YouTube, Twitch, Substack, TikTok, etc.

There are lots of non-commercial random blogs out there with useful information on long-tail topics. I agree that those will disappear from search, as AI will put a lower weight on their posts compared to something from a major website.