There is actually some science coming out about carbs causing certain insulin responses that make it hard to lose weight while also restricting fat burning production on the body.
In my personal opinion which is all I can speak from, is eating fat/protein makes you feel full and satisfied and therefore you can naturally eat less calories and have more energy
Eating carbs causing me to be more hungry, more often and on top of that have severe sugar crashes where I HAVE to eat or else(mentally). On top of that I feel like garbage and have lower energy. Not all calories are the same.