These comments have surely been made by people who lack any deeper knowledge when it comes to nutrition.If that were true pretty much all hunter/gatherer-societies and older cultures, both advanced and primitive, would have been populated by pygmies

.Itīs is true that humans have gotten taller, but the fact that weīve begun to eat more often has hardly anything to do with that, thatīs just evulotion in the works.In fact new studies have shown that when it comes to physical development thereīs no benifit gaind from eating several times a day compared to one, aslong you get all the nutrients(both macro-and micronutrients)you need.
So donīt listen to all those negative remarks about the diet, if you feel like this is something you want to try then go for it.
Namaste