Maybe that's true for NFT, but bitcoin absolutely does use an astonishing amount of electricity.
121 terawatt-hours per year isn't exactly nothing. It stands shoulder-to-shoulder with fucking
countries (it's in the top 30 consumers globally). I don't care if Ireland is "fucking tiny." It's not pissing away enormous amounts of electricity on digital tulips.
That's 121 terawatt-hours per year getting dumped into special-purpose silicon computing SHA-256 hashes and generating lots of heat. And that silicon literally can't do anything else. SHA-256 isn't even particularly popular for general cryptography (SHA-384 is more useful and arguably faster, and SHA-3 (the successor to SHA-2, which includes SHA-256 and SHA-384) is already gaining popularity). Worse, this gear is continually being rendered obsolete by faster and faster replacements; it's practically an arms race between ASIC developers to produce ever-faster hardware. This shit has a "useful" service life of less than 3 years before it gets tossed in the trash. And once something displaces bitcoin and it falls into obscurity, all of this "mining gear" will be completely useless.
That kind of colossal waste of raw material and electricity for one mostly pointless computation is utterly ludicrous.