RPG's are role playing games, not roll playing adventure games.
Oh, I have to jump all over this.
RPGs are first and foremost games. They are meant to have fun with.
The important thing about RPGs is NOT the R and never has been. Who taught you that? It's the PG. Playing Games.
Sure, DND is an RPG game where people roleplay their characters. But, the degree to which they roleplay and how they do that is totally totally totally irrelevant as long as the players are having fun.
The degree to to which players follow the rules is also totally totally totally irrelevant.
Strictly following the rules in a mega-dungeon with no verbal interaction with the NPCs at all is ok in an RPG as long as the players are having fun.
LARP DND with heavy roleplaying and following virtually no rules at all is ok in an RPG as long as the players are having fun.
The degree to to which players min max their PCs is also totally totally totally irrelevant in an RPG as long as the players are having fun.
When it comes to RPGs, it's all good.
Roleplaying vs. Power Gamer arguments, however, are total white noise nonsense.
If people are having fun, the RPG is doing it's job.
If the people are merely roleplaying for the sake of roleplaying, the RPG is probably not doing it's job.
But, fun is the primary goal for most people (many hard core roleplayers included) when playing an RPG. Roleplaying is not the primary goal for most people when playing an RPG. Roleplaying is often a means to an end, it is typically not the end itself. And, there are many many other means to an end in RPGs, including min maxing PCs for some people.