Yes way stricter than keto which is a major reason I don't do it, it looks boring AF and if it was so great then why are it's adherents so scrawny while none of the natural (and "enhanced") bodybuilders and athletes that I follow are doing it? It also doesn't help that the Carnies act as cultish as Crossfitters much of the time acting like it's the be all end all and everyone needs to convert to their thinking.

A high-protein diet is good for you, keeping your carbs in check is a healthy thing as well, much of what we've been told about fats are wrong as well. Also no one diet fits everyone's unique body, I know of some who built impressive physiques on high-carb diets but they were not eating tons of sugar they stuck to complex carbs and resistant starches. Sugars are carbs but not all carbs are sugars.