What's wrong with that ~so long as it was their choice, that they elected to be deficient in other major areas?
If a person wants to play as a bruiser, and is willing to give up playing the diplomat... Why should the game care? (...and not simply react.)
*And the same reversed; Why prevent them from playing the manipulative conversationalist at the expense of being John Rambo ~if that was their preferred choice?
I can guess
It's harder to design the game to support that; to fully support fringe cases. Bethesda seems comfortable with designing for a mutable middle range PC where everything is acceptably averaged, where a couple points either way does not really affect anything.
(FO4 opinions on that anyone? ~For me it's just a guess with that game; I don't have FO4 yet; the GECK hasn't been released.)