A US resident consumes 76 MWh per year [0], so 1.52 GWh over 20 years. A single model can be trained once and used by millions. Therefore LLMs are ~10000x more energy efficient than humans.
Your numbers are about how much is used also for transport etc. Sam's number were about what the human body itself uses for training, hence why I used the caloric consumption.
https://ourworldindata.org/energy-production-consumption#per...