This is a survey from gamers. There are a lot of games that only work on Windows, or work much better on Windows.
It's only been somewhat recently that games that support Linux have exploded in numbers. Somewhat coinciding with the release of the steam deck and the massive community it brought with it. There are now launchers for other stores for Linux and more every day.
Still, a lot of gamers don't really have a choice but to at least dual boot into Windows if they want to play some of the most popular games (Fortnite, for one).