This is something said in one of the press showings few months ago. That there is so many conversation options that even if you start minmaxing it eventually you would just fall into making choices naturally (I read this as: without a guide on your lap it will be impossible to consistently make the optimal choices, and this is their intention).
So basically, they know that it is hard to game the system and they are happy about it. Remember that it is not just stats changes that social options impact but also the solutions available in quests. So really, by trying to minmax one aspect of the system you might cheat yourself out of other social interactions on the paths that you did not choose, or even whole quests in some cases.
