Thanks for the response. I don't really like peanut butter all that much, but my approach to food is to just generally eat high-satiety foods and not worry about counting the exact quantity. I've found that it ends up netting out to eating the right amount anyway, without much effort. Calorie density by volume doesn't really figure into the way I eat.

It was along those lines that I figured that something that consists largely of healthy fats wouldn't pose a health concern. But I guess I wasn't thinking about other approaches to nutrition: it's entirely possible that a different approach would lead to overeating peanut butter, I guess.