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.