i have heard of the fuel leaking at takeoff thing, but it doesn't make sense to me why that would mean the plane would be fueled just enough to takeoff. if it l

i have heard of the fuel leaking at takeoff thing, but it doesn't make sense to me why that would mean the plane would be fueled just enough to takeoff. if it leaks, it leaks. unless a full fuel tank caused a major increase in the leakage, seems to me you would just fill it up. (although i did see the less than full tank seems to be due to the weight and tire issue at takeoff explained in the other comments.)