The missing ingredient here is that there is a gulf between what people really need, and what they do. Capitalism/market forces/etc. optimize on that "what people really do" and not what they need, and especially not what they say they want. See also, for instance, the layout of your grocery store.

The good news is that capitalism is in fact really good at serving exactly the preferences you reveal through your actions, and there are ways in which that is good. The bad news is that the farther away we get from our "native environment" the farther our needs and revealed preferences are diverging. I can think of no equivalent threat in our ancestral environment to "scrolling away your day on Facebook". Sloth and laziness aren't new, but that enticement to it is very new.

The discipline to sit, think with your brain, and realize with your system 2 brain [1] that you need to harness and control your system 1 urges is moving from "a recipe to live a good life" (e.g., wisdom literature, Marcus Aurelius, Proverbs, Confucious, many many other examples dating back thousands of years), but one a lot of people lived reasonably happily without, to a necessity to thrive in the modern environment. Unfortunately, humans have never, ever been collectively good at that.

And the level of brutality that system 2 must use on system 1 is going up, too. Resisting an indulgent dinner is one thing; carrying around the entire internet in your pocket and resisting darned near every vice simultaneously, continuously, is quite another. In my lifetime this problem has sharpened profoundly from minor issue to major problem everyone faces every hour.

For a much older example, see "drugs". Which is also a new example as the frontier expands there, too.

I have no idea what a solution to this at scale looks like. But I am quite optimistic we will ultimately find one, because we will have to. The systems can't just keep getting better and better at enticement to the short-term with no other social reaction.

[1]: https://thedecisionlab.com/reference-guide/philosophy/system...

Ultimately capitalism "works", but only if externalities are incorporated into the price.

Hence vice taxes on liquor, cigarettes, the short-lived Bloomberg tax on soda. See also - carbon pricing.

What would that look like for social media, I don't know. If we're truly brainstorming, what if Facebook were forced to charge you cash money for usage beyond a half hour per day? Or past a certain amount of posting?

I'm well aware that politically this would die even faster than the soda tax... selling a policy is often more difficult and important than policy itself