• All the employees, regulators and effort put into the auditing and compliance needed to make fractional reserve lending slightly less risky
• The leakage and losses due to carding fraud which goes unfixed because banks have little incentive to fix it
• The mind-blowing resource misallocations that result from misguided but well intentioned economic interventions, like the Spanish housing estates that were built then knocked down without ever being occupied ...
and so on.
Yes, Bitcoin mining is pretty wasteful today. It's a misallocation of resources caused by monetary inflation - the fact that you get to print money by solving SHA256 preimage puzzles diverts lots of energy and effort into doing so even though it makes no real sense. But Satoshi knew inflation caused harmful resource misallocation which is why he scheduled it to halve every four years (some inflation at the start is needed to actually issue the currency into existence, of course).
Now think about the wastefulness of mining, but on a massively larger scale, and without any end in sight. That's other currencies.