STOP MAKING EXCUSES.
If you want to be fat and lazy by all means then be fat and lazy - after all it is your life.
But stop making excuses, take responsibility for your actions and life choices.
If these incredible people can be competitive Bodybuilders without an arm or a leg ( or both ) or at 70 + years old you can get up off your lazy fat arse and get moving - its a choice - not genetics.
Genetics will determine if you will be a Neighborhood Champion or the best the World - nothing more.
Take responsibility for yourself - be accountable to yourself - Stop making excuses !