[ppseafield]

I think you're equivocating a bit here: FOSS fundamentalism (as you put it) isn't even close to the same kind of thing as Nazis. I think a better name would be FOSS purists.

IIUC you mean this in the context of desktop environments (and not including things like Android, server OSes, or ChromeOS). The problem with your argument is that those of us who use Linux as our main desktop environment don't want just another platform: the entire point of its existence is its openness. The point is and has always been that you can download it, install it, and run it without having to jump through arbitrary hoops, agree to restrictive licensing, pay anyone, etc.

Watering that down for proprietary software vendors goes against the whole point.

Maybe we would get more, possibly better software. Steam has certainly shown that for games. However, the entire reason that Steam for Linux even exists is that folks at Valve didn't like what Microsoft was doing with Windows 8, specifically the Windows Store and its games for sale, competing directly with Valve. They created Steam Machines and Steam for Linux as a contingency in case Microsoft tried to use their position to prevent another, competing marketplace from existing.

They can do that because of the license, and specifically because of the license no one can later revoke Valve's ability to use the OS, even if Linus or GNU decide to go into the games marketplace business. That's why us purists insist on it.