This might be romanticizing the early Internet.
I can remember plenty of flame wars in the late 80s and early 90s that were all about shutting down meaningful discussion. Informed debate flourished in niche areas, but it still does today, in a similar volume. What’s changed is the massive volume of social media that’s grown up around it, including many types of voices that were in short supply on the Internet in 1989, and many of which are uneducated and/or tribal in nature.





Isn’t that functionality built in to the OS? Set up parental controls, and you can do this with no extra apps needed. It’ll even generate reports.
Using Shortcuts, you can even map these profiles to different Focus modes.