I mean, I know people are commenting on whether the comparison is valid, but regardless, the BTC energy cost at at 741 kWh for a single transaction is pretty close to the average monthly household energy usage in the US of 867 kWh [1]. That seems pretty nuts on its face to me. [1] https://electricityplans.com/kwh-kilowatt-hour-can-power/
But I am not trying to defend the energy usage of PoW, here. A single Bitcoin block can only fit about 3500 transactions and all miners of the world compete for being the first in solving the emerging Block‘s cryptographic puzzle. This is where the insane energy consumption comes from.
Other cryptos work differently in that respect and, hence, are way cheaper.