>>21679007
They're okay for you if you don't eat fat. You can do the carbs thing, live on them well. But as soon as you start adding fat you BECOME fat. So you can choose to eat very few carbs and all the fat you need to satisfy you, or you can eat all the carbs you want but strictly limit fat. 
But we've tried to have both at the same time and that's why 2/3 of us are now obese. [Not here of course. Everyone is skinny here and criticizes the fat majority.]