Most Linux people play games, but that was not why they started using Linux. When people who only want to game start using Linux, it will become like any other OS, where protecting the uninformed users from themselves and others will have take more priority, thus limiting choices and freedom.

Gamers will not make Linux better, Linux has been nice since most people using it has an interest in Linux or open source or programming or other values that align with the community. Meaning there is a good balance between pure users, and users who also contribute in some way ( active on forums, code, etc ).

Gamer values generally does not align or even intersect with Linux communities, and the scammers/exploiters/malwares that feed on gamers will follow them. So we get more pure users, and also pure malicious contributions (viruses, misinformation, scams masquerading as game tips etc)