Genetics play a key role
Personal preference is a key aspect
Eating 1 meal a day is not beneficial for muscle protein synthesis, nor is it optimal in the grand scheme of things if your major priority is muscle building. Just like with IF eating in a condensed window doesnt have any more benefit over spacing our your meals. If you cherish MPS (Muscle Protein Synthesis) there is a reason there is countless studies showing multiple feedings a day to reign supreme over less feedings. You won't be able to spike MPS and allow it to reach its refractory stages for the best results.
Again everyone can do as they please, some people eat once a day because it suits them. There is no one size fits all in this sport. The same can be said with training, we all respond differently to different things.
Not everyone can get away with eating 4,000 calories our metabloisms just dont work that way. I bet if you tried or a large majority of us it just would not suit it, we would get bloated, its too many calories etc.
Don't always try and mimic what others do because we simply are not them. That is the biggest downfall in the sport. People try to immitate others when we don't have their genetics, their work ethic, their recovery and we all respond to things different.
If we were all the same, we would all eat the same meal plan, the same foods, and all train the same way and get the best results. Life doesn't work that way.
