@Mr_Mister People do those things with the time leftover after they do what is needed to support themselves.

And as fun as it might be to build something amazing in Minecraft, that is not productive. And firefighters who are volunteers do it out of love for their community. Not all open source code has value either.

Wikipedia has a lot of information, but it is also flawed. But it does have use.

Let us see what happens when people are not paid to farm.

@Mr_Mister this is the same brilliance as why are there homeless when there's so many empty homes? Have you ever been on a group project? Most people, if they can get away with it, will do the absolute minimum or just nothing at all. In the communist collective farms they all starved in Russia and China, UNTIL they were allowed to keep what they overproduced to goal. Even the successful hippy communes all have a system in place to kick out the non productive assholes and trouble makers...