That basically kills the business model and would wipe hundreds of billions of $ in capital away

Not that I disagree

Good!

I like this idea, to me the algorithm the most offending part.

But how do you control what a kid can or cannot follow? They can still follow Andrew Tate and his temu versions

At some point you have to allow people to see what they want to see. You don't have to make it so that what they want to see is pushed on them, though, and this is what modern social media does. It pushes stuff just because it's engaging.