Don't read into what I said.  You're adding a bunch there that wasn't in my post.
I said if I do it for roleplaying, I am optimizing my roleplaying.  I'm making a choice for ME to roleplay, which increases the roleplaying for ME.  I never claimed superiority over other people in some way. 
Look at it like this.  Player A and player B roleplay equally well.  Player A optimizes for combat and player B(me) optimizes for roleplay by picking an "inferior"(your word, not mine, and wrong word to boot) race that fits my concept.  That is a choice that optimizes my roleplaying.  It makes it easier to fit my concept, even if roleplaying ability is the same.
I mean, Player A and Player B can both roleplay being phenomenal investigators, but if Player B makes the choice to optimize that roleplay by picking up the Prodigy Feat and adding expertise to investigation skill, he has optimized his roleplay.