Bread is a grain, regardless of how "dark" it is. Yes, you've gotta have roughage, but you can get plenty of fiber from fruits and vegetables (raspberries, kale, and avocados are super high in fiber, but the list is much longer than that).
Grains are completely unessential in our diet at best, and at worst, detrimental to our health in the long run.
pure basic logic says that you have to burn exactly the same amount of calories that you absorb for maintenance and cutting fats to reach that is generally pretty easy.
Completely false. Cutting fats and/or calorie-counting is not how one maintains a healthy body weight. The body is far more complex than people think, it's not as simple as "calorie in, calorie out" and "eating fat = getting fat." Like I said above, pick up "Good Calories, Bad Calories," it will blow your mind and change how you view calories, fat, and diet in general.