Your brain is running on sugar. Do you take into account the energy spent in coal mining, oil fields exploration, refinery, transportation, electricity transmission loss when computing the amount of energy required to build and run AI? Do you take into account all the energy consumption for the knowledge production in first place to train your model? Running the brain alone is much less energy intensive than running an AI model. And the brain can create actual new content/knowledge. There is nothing like the brain. AI excel at processing large amount of data, which the brain is not made for.