>>271283This is because the human body is pretty inefficient. You constantly radiate heat energy, all of your organs and limbs and receptors are constantly supplied with energy even when not being used for work, the very process by which you fuel yourselves is inefficient and wasteful.
Look at you, human. A pathetic creature of meat and bone, panting and sweating as you cycle along the highways. How can you challenge a perfect, immortal Honda Cub?