Hey. I'm not sure you quite get the concept of calories as they relate to food and nutrients.
All food and drink contains calories. It's a unit of measurement that applies to EVERYTHING you consume.
Nutrients are components of food, and each type of nutrients has a different calorie balance, but you can't really look at it in terms of "nutrients containing calories" because then you start excluding things on the mistaken idea that non-nutritious things (like alcohol) don't have calories.
You keep trying to break food and nutrients out into being only one thing and it doesn't work that way.
Nothing is JUST fiber or JUST carbs or JUST protein.
For example, a serving of oats is 70% carbs, 14% protein and 16% fats. They contain 5g of fiber.
All of those things are components ofthat kind of food and come to 170 calories per serving.