Hence the call to point out things that are either better on the blockchain, or of value and that can be only made on the blockchain.

Then it's a case of discussing wether the power consumption is worth it.

So far in this thread all that anyone's come up with is "because I might want to send money to someone that my government has banned money transfers to".

I have previously asked elsewhere and got a load of answers which fall into the "technically can be made on the blockchain, but can be done far more efficiently and effectively using exisint tech", eg. carbon credit trading, and (rather surprisingly) "publishing a website".