Dude I have so many examples, I'm around a lot of people due to my employment, and I've witnessed some incredible individuals with crazy genetics, theres another guy on my ship he is 60, he's from the Phillipines, he's a dish washer, the guy is an anatomy chart, he has the physique of Manny Pacquiao and Bruce Lee combined, he is small but completely shredded head to toe, cross striations, vascularity..it's unreal, the guy smokes a pack a day and eats like shit, breakfast always has a huge coffee with cream and a ton of sugar, a few pastries, doughnuts, cereal, lunch and dinner typical Fillipino diet, tons of rice, with meat, and always has ice cream with lunch and dinner. He trains in our gym like 2-3 days a week, just light, pump, circuit type full body workouts. I tell him all the time how crazy his genetics are, he barely speaks English, but always smiles and says to me "no you are the boss" He has a daughter in the Phillipines who is like 24, I always tell him I want to marry her and breed a super athlete.
this is sort of off topic, but when I was in the Phillippines in march I was over on the island of Palawan and taking a van from the main city up to the northern town for the resort. During the drive you go through remote areas where they live on mainly rice, fruit and maybe some pork and a little beef. There are no grocery stores or gyms or anything like that and I saw several guys that were ripped and had a little muscle as if they have trained for a decent amount of time. I know they have ever seen the inside of a gym and they simply just do manual labor to live. It's totally genetics and anyone who doesn't want to believe that is delusional. I do believe anyone can get lean but some people just have the genetics to be lean no matter what.