A computer is much like a car or a gun, their ownership blurs the line of public, private, and personal property. I think we can all agree there is something fundamentally wrong with an individual buying a whole bunch of GPUs to mine crypto. How much computing power is too much for an individual person to be allowed to possess?
He's wrong on a lot of specifics, but in the broad strokes he's absolutely correct. Everyone online is shouting, therefore nobody is bothering to listen.