This thread is for complaining about things that are counter-intuitive. I think a guy who can travel in time merely by flying against the spin of the Earth isn't much of a defense, here.
Your typical male elephant comes in at 6 tons or more. If I have my math right, that means a character has to have a Strength score around 40 before he could lift and stagger with the thing. Compare that to the elephant, for whom a medium-sized PC doesn't even qualify as a light load.
Yeah, I'm sorry, but the rule makes sense, given the base assumptions of the system.