These data centers actually serve apps that 100's of millions of people use every day...
Those data centers generally do useful things though.
To be fair, the bulk of what they do could probably be missed without anybody noticing other than that there would be a large collective sigh of relief. There is so much junk produced that I would not be at all surprised if that dwarfed the crypto computers, but it is much harder to identify.
Normalized per transaction?
At least that is not poor technology as Bitcoin. Which is ineffective by design.