The reason is, I don’t wanna.

There isn’t any game I want to play bad enough to install malware on my device.

Yes, actually.

https://www.bbc.com/news/technology-18996377

“We want to make it as easy as possible for the 2,500 games on Steam to run on Linux as well,” said Mr Newell.
“Windows 8 is a catastrophe for everyone in the PC space.”

That’s true, but unfortunately some of them were against it for all the usual incorrect reasons. :/

Yes, it is worth it to remember.

They naively expected publishers and developers to give a shit.

But after that failure they worked hard for years and contributed and donated to open source projects.
That allowed Linux to become a true competitor in gaming space with zero vendor lock-in.

Whatever their reasons were, the results are objectively positive for nearly everyone.

It probably will anyway.

Index and Steam Deck both sold like crazy on release, Valve has already proven itself with their hardware.

There’s really nothing new, it’s the same as it was on the Steam Deck.

If the devs are not assholes they can easily allow Proton, from what Valve said before often all it takes is literally one checkbox on their side.

The point is that if you convince yourself there’s no chance of succeeding, then maybe you won’t feel so guilty about not even trying.