I kinda get what you're saying, but almost all of his paint touches come with his back to the basket. He isn't the type to rely solely of facing you up and getting to the hole. He relies on his fadeaway, spin moves, and rising over opponents, but they all start with him having the ball and his back to the basket.
It sounds more like you don't believe he is a banger in the post, and that is mostly true. But I think he has proven he can score with his back to basket. He just isn't going to overwhelm anyone with strength and power in the paint.