Bazzite is actually two levels of specialization away from Debian. Yes, it supports gaming better than other distros, especially on the current wave of handheld devices, and last I heard 2/3 of its users were using the handheld/HTPC version of Bazzite.

But it is also part of the Universal Blue family, which means that updates are atomic and can be rolled back. SteamOS, GNOME OS, and KDE Linux are all trying the atomic distro thing, but you don't get it out of the box on the mainstream distros (yet).