Valve just shot themselves in the foot.
I don't know how much the rest of you know about PCMR culture (I'm an expert), but honor and shame are huge parts of it. It's not like it is in Nintendo-land where you can become successful by being an asshole. If you screw someone over on Steam, you bring shame to yourself, and the only way to get rid of that shame is repentance.
What this means is the PCMR public, after hearing about this, is not going to want to purchase the Steam Deck, nor will they purchase any of Valve's games. This is HUGE. You can laugh all you want, but Valve has alienated an entire market with this move.
Valve, publicly apologize and cancel the Steam Deck or you can kiss your business goodbye.