The problem with being bulky is that it's useless; what you need is endurance (in both the sense of moving distances for a long continuous time as well as carrying equipment), mobility and the ability to hold out for long periods of time with malnourishment. Bulky people aren't build for that. They are too large to hide, too large to miss, take up too much space and need too much food, and all that just for raw force, which has become more and more obsolete already with the advancement of even the most basic technology.

Hell, we've had bows, spears and horses for so long and a guaranteed food supply for so short that it's not strange to state that real 'bulky' types are a relatively modern phenomenon, because they wouldn't have had any use.

I'll let these images speak for themselves: