League of Legends is a popular game that has a reputation for having toxic players, as well as requiring kernel-level anti-cheat, which is intrusive and so disliked here, and also does not work on Linux.

Thus, by switching to Linux, you can avoid the unwanted chance of playing League of Legends.

it means league of legends blocks itself from being installed on linux

Interesting choice of instance in that case.

It means League of Legends is bad, but Doom is not.

League of Legends and other games by the same company require you to run an anti-cheat system that has more control over your computer than even you as an user can ever possibly get while windows is fully loaded. It basically controls windows itself - so all the tools that Linux has to run windows game are ineffective for these. It's like the game is running windows instead of the other way around.

The other point is that games like LoL tend to have a weird effect on people. It's not the case for everyone but most people I've met who play it, absolutely hate the game and feel miserable within minutes once they start playing - but they get cravings for it when they don't. So they keep going back to play more and get mad at it again every day.

At the same time, people who don't play those games and see the toxicity in it often meme about how the world would be better if it didn't exist.

So the OP text is similar to saying something like "there's no cocaine there" being a good selling point for living in some country.