It's basically that guys (generally) who don't care about sports think every other guy cares about sports, so sometimes they performatively don't care about sports because they think that makes them interesting.
"So excited for the sportsball game! How many field goals is it to do a lay-up, again? Ooh, home run!"
The problem is that every other basic nerd on Twitter has been making the same jokes for a decade now, and so the whole thing is just beat to death at this point. Now it's like someone who doesn't care about the Super Bowl and doesn't comment about how much they don't care is like a white whale.