I think you're misunderstanding what I'm saying. I enjoy plenty of non-spicy foods, and don't need every meal to be spicy, nor to I think that the only flavorful meals are spicy meals.

My point is exclusively with chili peppers, as the spice increases so does the flavor. I didn't grow up eating spicy food, and my experience has been that as my spice tolerance has grown overtime I have found access to increasingly wonderful flavors that are simply not present at lower spice levels.