Unfortunately the scientists are still around from the old days, but iifym and the old school "eat every 2hrs" are like atheists and Christians arguing. Only one has scientific reasearch to back it up the other is "it works for me so therefore it's right" I wouldn't worry tho bro no point arguing about it, i myself have seen better improvements with less effort due to following iifym so as long as we're personally following something that works and someone else wants to work twice as hard for the same results, then let them