With respect, I don't feel you've defended anything. Some blockchains may be less wasteful than others, but almost every popular one is very energy intensive an

With respect, I don't feel you've defended anything. Some blockchains may be less wasteful than others, but almost every popular one is very energy intensive and IMO you haven't even talked about the elephant in the room: do they provide value in the first place? You mention some lofty things that would be nice to solve like housing, but there exists no connection between blockchain and those things, and no information on how blockchain would re-organize incentives or even if it is the right tool for the job. I fail to see the defense here.