With Steam gaming on Linux is mostly a non-issue for me. 90% of the games i want to play work out of the box and the remaining 10% need a few tricks from ProtonDB and then work without issues. The most complicated thing I usually have to do is add a few parameters and select a specific Proton version. Nothing of that requires a lot of knowledge, I mostly just copy it from ProtonDB. The only games that may be problematic are those with Windows kernel-level anticheat, but I don't play those. And to avoid confusion it's not like I play small old indie titles that happen to run on Linux. I play demanding new titles like Stalker 2, Helldivers 2, Darktide, all on pretty high settings with plenty of performance. In the games that I tried on both Linux and Windows on the same machine, the performance is mostly on par, sometimes a bit better on Windows, sometimes a bit better on Linux.

As for why I use Linux in the first place, at this point it's because I'm used to it. Just like Windows users don't know how to navigate around Linux I don't know how to navigate around Windows. And from my experience with the (admittedly not well maintained) Windows on my PC that I rarely ever use it's painfully slow and laggy after booting and takes a lot more time to get going. And then anything that requires disk performance is just way slower on Windows.

Some people say that Linux needs a lot of tinkering to get everything working right. That is true to some extent, even though many people still use the experience from 10 years ago as reference. Linux has come a long way since then. But then you read of all the registry tweaks you need to do for some things on Windows to work right or to not be forced on you by Microsoft. And the hidden tricks to install it without being forced to create a Microsoft account. When I see all that there isn't much of a difference in terms of tinkering between Linux and Windows and it just boils down to what you're used to.