Oh good, the Bitcoin argument.
"Sure, Bitcoin wastes a lot of energy, but you know what else wastes energy? The Visa payment network."
Yeah, but Visa handles six quadrispillion transactions per megawatthour, Bitcoin handles two drug purchases. Not the same results, is it?
So yeah, training humans takes a lot of energy. But in the end, you get a coherent, capable and well functioning individual. Spend the same energy on training LLMs and you get a system that'll happily tell you to glue the cheese on pizza or something.