Gardner McKay
RIP, Jimmy.
What is necessary for one is not necessary for someone else. You could argue I didn't "need" to go on Keto based on the amount of weight I had to lose. Keto also helped instantly control my hypertension (something I have had since I was 23). Some people can't just make minor adjustments. Some folks need something to follow. I am one of those people. I've never really been super unfit but just found myself starting to creep towards a dad bod (which is highly unacceptable to me).It is a thing, but I just don't think its necessary.
I think in general, the less restrictions you have, the better off you'll be and the more likely you'll be to make a life style change.
For someone like Palms, it sounds like he just needs to make a few minor adjustments. I mean he can Keto if he wants, but it's not necessary.
Dieting to lose the weight and then making minor adjustments to eating habits to sustain long term weight loss is what works for a lot of people. There are additional health benefits from certain dietary restrictions that go beyond weight loss.