Nah, you're getting too deep into your own feelings. Most threads I've seen where people start talking about Linux as a viable gaming option, it's because some commenter or the OP mentions a problem they're facing in Windows, which is directly solved or mitigated in Linux. Also, most of the time when people recommend Linux, it comes with warnings like "it has a learning curve" and "not everything works". The hard line Linux-or-bust types are definitely not the majority.

Also, the very nature of Lemmy means the userbase probably skews towards more techy types who have been using Linux in their professional lives for years and have naturally come to harbor positive feelings for it. That drives the recommendation as well as anything else.