While previously you've been able to play League of Legends on Linux, and there's some pretty die-hard fans using Wine to play it, that's set to end soon with Vanguard being introduced.
This also applies to Valorant. I know a lot of people look down on both games, but it’s still unfortunate for Linux to lose access to such a popular game.
I thought this part was particularly interesting:
Half of anti-cheat is making sure the environment hasn’t been tampered with, and this is extremely hard on Linux by design. Any backdoors we leave open for it are ones [cheat] developers will immediately leverage for cheats
clicking install in lutris rather than just downloading is not much more effort for the end user. Beit supported or not, a rather tech savvy group such as linux users can handle that obstacle and thus the numbers will not change drastically (just my asdumption)
Well LoL has no official Linux support, so a low current number of users is no indication of the size of the potential Linux player base.