If you're asking if there's a version of D&D that's pure math and no roleplay, the closest thing I can imagine would be Dragon Dice, or something with the mechanics of a very basic roguelike. The math in D&D itself such as in combat is affected by your character's stats and the encounters created by the DM, so the mechanics and the role playing are kind of tied together.
Now, the genre itself, all the storytelling involved, can easily be adapted to more serious, or even abstract, thinking.
In fact, it was, and there are plenty of alternative rpg universes. But, similar to how serious non-marvel movies are a niche, serious rpgs are also less popular.
Just to make it clear (and perhaps to state the obvious), you are not believing in these when you play these games or read these books, you are voluntarily suspending disbelief.
Power? Not necessarily. Numerous rpgs have nothing to do with power. Be a Cat has nothing to do with power, and everything with escapism (and cats).
I mean, there is nothing wrong with power and fantasies. Or powerless fantasies, as in horror stories, or whatever.