Maybe you do and maybe you don't.
Depends on skill level but have you seen the size of some people these days? lol
I don't like to make too many assumptions about my opponent's skill level. Even a year of training or a wrestling background makes a difference.
Yes and with size/strength difference your margin for error shrinks rapidly. It might not be an issue for many arts but it is an enormous risk to turn in for a Judo throw, so one would be advised to have every advantage to use it in a street fight.