> you can only imagine proof of clapping hands because yes that example is useless.
People do it all the time, it must have something. But no practical value. But let's not argue for the sake of arguing. It's like saying Ponzi schemes are good otherwise so many people wouldn't be into them. Or any example of things so many people do that have no value and we'd really rather they stopped.
Proof of Whatever is just about gobbling up some resource (sometimes with incredibly high cost for society in general) for some artificially driven value but of no practical positive consequences to almost anyone in the world. Except for the few that are incentivized to make it look more valuable because they've invested and its actual value never changed. It's still a solution waiting for a problem.
And before you argue more, the computer and internet you're using to post your opinions were created with far less waste and provide far more value. If they go away tomorrow the world will suffer a lot, society will literally regress decades. If proof of waste goes away the "investors" in the pyramid will suffer for being tricked and the rest of the world wouldn't bat an eye.
But proof of work is not useless, hence we don't have to imagine it. Distributed consensus is useful to many people at this point.