Cars free me from the drudgery of walking to places but I still ride my bike to stay fit. You are an energy optimization machine and lots of your biology is use it or lose it.
This is like saying digital electronic computers would never be economically and environmentally feasible if we had extrapolated out from the Z3 and ENIAC.
Estimates on the energy cost of ChatGPT-o3 per request (never mind training) are scary.