Yes, but that's why I keep saying average user. Your average user mostly just browses the internet, casually plays games, and uses common software like word, with increasingly many apps/services being available online. Gamers who mess with drivers, the hardware, and bios settings and such are not really the norm. How many people in your life are afraid to touch the windows settings, if they even know where to find them?

Honestly most of the popularity of windows at home these days I'm willing to bet is because it's what's installed by default, and of course because of familiarity.

You're right of course that professionally you can't always replace windows, and while proton let's you play almost anything there are certain games that aren't available (usually because of anti-cheat). Most pc users however won't notice as they aren't gamers. I do also find that the settings and gui package managers on most distros are way more user-friendly than what you have on windows, which I think is another point in favour of using linux casually.

EDIT: Also most users don't have high-end machines, and linux pc's are nicer on the hardware and are less performance intensive which means their computers will be relevant for longer.

Bazzite kinda solves most of these issues though honestly. It's immutable, so it protects you from doing things that might severely impact other systems. It also already has hardware support for things like fan control for a bunch of systems (Nvidia, Steam Deck, ASUS RoG handhelds).