its about getting your body int an energy defecit, not about carbs or fats. you can do high carb low fat, high fat low carb, med carb med fat..... all will work for fat loss as long as your energy out exceeds energy in.
there is nothing about carsb that makes it so you cant get ripped, in fact 99% of all bodybuilders have always used a high carb low fat diet (of course high protein as well). the most shredded/best bodybuilders of all time have been high carb low fat. munzer, dorian, coleman, flex, shawn ray, kevin levrone, nasser, dexter, victor, jay, lee haney, kai green, phil heath, lee preist, chris cormier, etc etc etc.
carbs influence t3 levels, cortisol levels, igf1 levels, glycogen levels, cellular water content.... they are anti catabolic and protein sparing... etc.