You can really get this physique naturally just by cutting out meat?
No. And I don't think he is saying he got that physique by not eating that.
I think he's saying now that he's 50, here are the foods he does not eat.
Which is factual. You don't need to eat the same foods or same amounts of foods over an entire lifetime.
Americans biggest problem is once we realize we can expand our stomachs during meals we will eat until our stomachs hurt and keep eating that way until we die. Just like an infant or a toddler doesn't need to eat as much as a 22 year old man, a 50 year doesn't need to eat as much as a 22 year old either.
Americans never learn to hit the brakes or scale it back.