Truth.
As a Getbig educated health expert, I believe genetics plays a dominant role in just about anything health related.
People want to control their fate healthwise so this is an uncomfortable thing to accept, i.e. that you really have little control.
Very true, i've been studying a lot about health the past 2 years. The two biggest aspects of health for the "average" person are genetic response to stress and diet. Exercise has a small role to play for the "average" human. We aren't designed to run marathons or lift heavy weights 6 days a week. The healthiest people who live the longest are found in "blue zones" across the world; they have a good natural diet, little stress and are typically very active, but in just general movement, not exercise.
The craziest thing i've learned is that people who live a long time typically don't try to, it just happens.
I've been able to become much healthier by eating less meat, walking or hiking instead of fast cardio and very little weight training. The thing that changed my life the most was moving to small quiet City where everything is slow and calm. I lived in the big City for 38 years and since i left i have become so much more comfortable, i have zero stress and every day feels like vacation.
Oddly enough, i know i man who's 94 years old. Fought in the War, smoked for 40 years, eats red meat and fried food all the time. It's a crap shoot i think.