

Because there isn’t a solution.
This has been discussed and experimented with to death where such networks existed for a long time. Just because you never heard of them or even knew they exist doesn’t mean that they don’t.
See Freenet/Hyphanet and the three approaches (local trust, shared user trust lists, web of trust) if you want to learn something. The second one worked out the best from a performance and scalability point of view compared to the third.
Apologies if I was presumptions and/or my tone was too aggressive.
Quibbling at No Moderation = Bad usually refers to central moderation where “someone” decides for others what they can and can’t see without them having any say in the matter.
Bad moderation is an experienced problem at a much larger scale. It in fact was one of the reasons why this very place even exists. And it was one of the reasons why “transparent moderation” was one of the celebrated features of Lemmy with its public
Modlog
, although “some” quickly started to dislike that and try to work around it, because power corrupts, and the modern power seeker knows how to moral grandstand while power grabbing.All trust systems give the user the power, by either letting him/her be the sole moderator, or by letting him/her choose moderators (other users) and how much each one of them is trusted and how much weight their judgment carries, or by letting him/her configure more elaborate systems like WoT the way he/she likes.