Yeah I wasn't thinking that all the way through. It might be okay if it wasn't possible to just fire up all that hash rate again.
Even if possible, no one would do it out of altruism. The most likely scenario would be someone doing it to attack
So back to the conclusion that mass pleb mining adoption is a good thing. 2kW per day per pleb will probably do the trick. Maybe 10 bucks a month at today's rates. By rough math, 50 plebs will out-hash an S21. That's about 4 ASIC chips per pleb. For every man, a Bitaxe Quad.