What you're saying is true, but people don't always do what actually makes them happy - see addiction. There are teams of people out there building social media

What you're saying is true, but people don't always do what actually makes them happy - see addiction. There are teams of people out there building social media sites, games, etc. that are designed to keep you on there as long as possible. Not for you to get entertainment out of it. I think that's dangerous. Maybe in a world without work the incentives would change and these platforms might not exist in the same way. But as it stands now >50% of the people I know with too much time on their hands end up self-admittedly pissing most days away. A few of them have already decided to return to work even though they don't need to.