Speciality derivatives come with attention to detail and purpose-fitting that often isn’t found in general purpose distros, like how Nobara has a system to auto-apply fixes for common problems or how Bazzite includes an overlay for game stats (framerate, etc). Rolling and bleeding edge distros have been popular because people want to use the latest hardware.
Can you get these things with a general purpose distro with older kernels? Sure, but the process varies depending on distro, hardware, use case, etc and isn’t necessarily accessible to many, even with the selection bias towards a technical mindset that comes with wanting to switch to Linux. It’s the same reason why Windows has been popular for so long and why Valve has seen outsized success with Linux: the fiddly bits have been minimized.
Major distros could pull in many of these users by sinking resources into that golden “out of the box” experience and aggressive hunting down and fixing of papercuts.
What do you mean "PC Gamers"?
It's not limited to PC Gamers. The CAD program I use for PCB layout won't run with full functionality under Wayland because "The Developers Know Best".
So, having to choose between Wayland or delivering PCBs, guess what my choice was.
Gnome and Wayland are really user-hostile - if their vision doesn't align with what the majority of users want, its the users that are wrong, not the developers.
It was absolutely bonkers to me and soured me from Linux for years.
I’ve administered thousands of Linux boxes but it’s a totally different ball game.
You can look up gamescope-session for more info.
Its something that I generally wouldn't expect on traditional mainstream distros.
Which as an aside, I think distros should advertise better. It must be awful to be sold on a distro only to find that it doesn’t support your newish hardware. A simple list of supported hardware linked on the features and download pages would suffice but a little executable tool that will tell you if your box’s hardware is supported would be even better.