https://www.youtube.com/watch?v=UqLI1xKc-L4
This is why autists are fantastic, been curious about this for awhile and yeah, any of us who give a shit about the state of games should not be installing modern multiplayer games at all at this rate. I would not be shocked if even Valve get desperate about the cheaters in their games and they go all in on anti-cheat spyware. Alternatively they may end up officially partnering with face-it.
TLDR: It's worth than anyone thinks, this video gives context and detail.
Steam Deck is a Linux device so I don't know how accurate the idea that Valve will be quick to throw it overboard is. Non-Steam Deck users are a side effect and not a goal, so, sure, no one cares about them specifically but they can't get fucked without Valve fucking themselves, too.
That said, with the leaderless chaos that is Valve's employees, that the left hand didn't know what the right hand is doing wouldn't be too much of a stretch.