I'm heavy into roleplay, and that's how I prefer to play D&D.

And I think you're probably right.

D&D is barely the right fit for the kind of game I like to play. But D&D is wildly popular, and it's much easier to find people who'll play D&D with a heavy emphasis on roleplay, than it is to find people who'll play Heart, or Wildsea, or things that are even further way from the "roll-play" aspect.

For what it's worth, we still engage in combat, we use our various abilities outside of combat, etc. Most of the rules are about combat. Even the magic section is framed around using magic in actions. But exploration, etc., is still a part of the game; it's just that those rules are jotted down on like 5 pages out of the 200.