So super mutants are very bulky and looks huge just like their counterpart nightkin, but are they just always bulky in general??, because there is no super mutants nor nightkin that are skinny, Slim and even obese, just that they are always bulky
The simple answer is that the devs(msot of all of them) jsut don't make a varied cast of super muntants when doing the games for the past....13 years...
Or it could be that whatever the results of the FEV it jsut credited a standard template that no gender, race would "always" resort to the standard physical form with rarities like Behemoths existing. But I don't know the in game answer or lroe these are just skepticism on my part.