dude, in your daily like when do you have a need for "speed or range of motion"...running to catch the subway? 
That’s a legitimate question. It comes down to lifestyle.
The guys I have known who look like that simply do not move the way I want to move. They waddle, move slowly, some have labored breathing doing simple tasks. etc. When I think of the things I have done in the past, am doing now, and want to do in the future (surfing, kite surfing, biking, running, hiking, etc.) being that size is inconsistent with the physical prowess I want and need. One doesn’t often see guys like racing on bicycles or playing tennis for example.
It’s the difference between functional and cosmetic muscles. On my body, I want functional muscle.
