He did a doctorate in philosophy of public health after his medical degree as a rhodes scholar dude lol.
He is brilliant. He has two doctorates and he moved to epidemiology and public health which was clearly his plan as he undertook another degree.
He is a medical doctor, he is not a physician. He is also a PHD. He is an MD/PHD, very hard to obtain.
Not hard to become an MD, it takes good study habits discipline and you need to demonstrate a willingness to help others that goes beyond financial compensation. I went to jc to become a nurse and spent a fair amount of time with AMSA and the obvious future doctors pretty much had all those traits. They studied and travelled together, did homework together and generally were disgustingly perfect and normal. The Asian ones. I was friends with a couple girls from africa, kenya and nairobe specifically, and I think one made it as she already had her RN but decided to go MD (for the money really) but I'm sure she's a great doctor someplace.
The point I'm making is that, for these kinds of people, becoming a doctor is simply a choice and once they decide they want to do it they follow a plan to achieve it. It's not really hard for them at all.
Interestingly I knew if a guy who, at 40, went back to do his science classes as a refresher before taking his MCAT. he took all four chemistry classes in one semester and got As In all four. Genchem1 and 2 Ochem 1 and 2. All at the same time. Got straight As. He became a cardiologist but that's neither here nor there.
I'm not saying the credentials of this guy you are talking about are not impressive all Im saying is that for him it probably wasnt as difficult as it seems to you and I. Sticking to a diet and winning the olympia is probably far far more difficult, if I had to guess.