IIFYM IS a "bro diet". The problem is that kids today changed the meaning of IIFYM. They think its eating pop tarts and skittles instead of rice and fruits. In reality iifym has been done for decades by bodybuilders who ate real food, not processed garbage. So to say you like a bro diet more than iifym is kind of stupid. Even if you're on a ketogenic diet, you're still doing iifym, its just that your macros shift from carb-centric to fat-centric. The quality of food not only brings better results physique-wise (complex carbs + fiber vs processed sugar), but also make you feel great without sudden insulin spikes/crashes.