When I was at school, energy could not be created or destroyed, merely converted from one form to another, and undesirable losses normally occurred during the conversion processes.
I am not a physicist, but surely the conversion chain from chemical to electrical then to kinetic is a longer and more wasteful one than chemical to kinetic. Then as mentioned above, the carriage of motors, cabling and coolant would be very wasteful over time.
The green argument is looking a little thin.