Ah! I may have a meta-contrarian position to contribute:

This is not useful -> This is useful for having fun -> Fun is a valid goal, but this is a fairly ineffective way to have fun.

In the same way that people are routinely in error about how to improve everything else, they are routinely in error about what things are good at actually providing fun. And there is a familiar resistance to the direct application of thought to the problem, which relies on the normal excuses ("Isn't it all subjective?", "But thinking is incompatible with feeling! Haven't you seen Spock?").

Playing sports looks really good from an "effective hedonism" standpoint, even up to several hours a week. But for most people, I'm skeptical that regularly watching sports provides a decent long-term return, when done for more than a few hours every month or year.

Tangentially related: My local baseball team is far funner to watch than the top teams, because they make more mistakes, which leads to more unpredictable and exciting plays, but at the same time they're still athletic enough that you're not just watching children flounder around. In the same way, I really enjoyed the last superbowl.