I find it hard to believe you actually know much about what you are saying. Gaming on linux is a limited, poorly performing, second class citizen experience at best. And the support when you run into an issues falls on death ears. Feel free to look at steam, filter by OS, note that when you remove windows from your selection the majority of top rate popular games all fall away.
It is far easier to limit your ad experience, and have a dedicated windows gaming machine than it is to switch to linux for gaming.
Those only count the games that have native Linux versions. Most games are also playable through the Proton compatibility layer. You can see which games on ProtonDB. For example, the Witcher 3 is listed as Windows-only on steam, yet has a Platinum rating on ProtonDB, which means it works fine on Linux out of the box. Funny enough, the Witcher 3 is also Steam Deck certified.
Sorry to ruin your attempt at a jab, but I've posted proton links in of the few responses here. It is fair to say there are far fewer games that are platinum than gold on proton.
And something working and something being supported are vastly different.
And this may come to a shock to you but many people who want to play games don't want to tweak setting to make that work on a unsupported operating system.
This isn't a case for can you do it, this is based around the vast majority of games work fine on Linux, I don't think the average gamer would include making game specific tweaks as fine.
It is far easier to limit your ad experience, and have a dedicated windows gaming machine than it is to switch to linux for gaming.