TBH, the whole "game of skill" thing (notice how obsessively often this particular phrase pops up) is just a way to sneak fantasy sports through a loophole in anti-gambling laws. For your average Joe, it's indistinguishable from gambling - including all the addiction and collateral damage that causes gambling to be heavily regulated in the first place.

But it is a good game for bored STEM undergrads, just like online poker is a good game for bored computer science undergrads. I had a few guys on my year who lived completely off online poker games while in university. They deployed custom-made scripts to automate playing on multiple tables at the same time, and probably did some other things that they didn't tell me. It's the same thing with fantasy sports, except you spend most of the time maintaining complex spreadsheets.