Because this is not a code problem.

It is inherently a people problem.

The issue is simply that any fix (by code or by competition), will only move the conflict point from its current location to a new place on the board.

Without being able to approach the bad actors and their motivations/incentives directly, you will not be able to effect change.

And there is always going to be an incentive to manipulate minds, easily and at scale.

Because the industry is deliberately creating addictive products that happen to be detrimental to the health of the people who use them. Facebook is the biggest offender but any time you hear the term "engagement", that's probably what is going on.

This isn't just going to go away, it has to be fought.