As I am reading your comments more, it seems like you just don't understand this trifecta of software engineering, security, and economics. All blockchains that run code on untrusted nodes have the extremely difficult problem of securely verifying other nodes transactions which usually devolve into solutions that solve O(constant) problems on O(N) nodes with N/2 majority consensus governing the network. That is literally the worst solution you can come up with in computer science because it does not scale whatsoever.

Contrast this with running code on nodes you trust which scales linearly and you should be able to see why everyone says blockchains are a solution in search of a problem.

> "I know it would be better to have a tech that consumes less energy, but I also understand why it's not a trivial issue, because physics and economics."

So thus I ask, what "physics and economic" problems do blockchains solve better than current solutions bar illegal markets?