We need just a few people who think like you do to actually build a future regular people want.
To simplify it for normal people. My family all use browser extensions to block ads/tracking and shore up security because I set it all up for them. My non-technical friends don't. They understand video game mods because adding mods is fun. But the idea of modding other kinds of programs makes no sense to them, because those are for getting work done, not for tinkering with.
So in order for it take off, it needs to be presented as just a native feature of the web. In people's heads, the logic should go like: "My email software lets me forward emails. My calendar software lets me invite people to calendar events. My contact software lets me merge duplicate contacts. My web browser lets me annotate web pages with other people. What a strange world it would be if things didn't work like that?"
Only really implemented in Amaya, the W3C’s own browser/editor, and like the rest of the browser a little bit clunky.
Like, I read Ars Technica. I have friends who read Ars Technica. Why can't we leave annotations for each other on Ars Technica without Ars Technica having any control over or knowledge of what we say? Why can't we do that to Facebook and Twitter and reddit and Hacker News and Mastodon and Medium? Sidechannels for everything. End-to-end encryption eventually. Self-hosted, you bet. All the most important features of social, with none of the advertising opportunity.