You can't assume that just because somebody is doing what they enjoy that there's no money in it. In fact, it can be quite the opposite. Getting back to the example of farming, once we invented machines like tractors and combines, we freed up a lot of the manual labor that were previously slaves on plantations. Fast forward to today, and the very people that would have been working tirelessly on a farm a few hundred years ago now have the freedom to explore what they really enjoy, like playing professional competitive sports. And we gladly pay these talented and super-athletic individuals millions of dollars every year just to see them hit a home run, throw a ball through a hoop, or kick a field goal.