When you say "muscle" you probably mean big beefy muscles? If you're stocky then that what you get but I've got a 'wirey" frame so I can get lean with muscle definition without too much work. If I wanted to get "big" then yeah, it would take a lot of training and effort.
I have a friend who is "big boned" and she's got a very low body fat % - she looks defined and awesome, so it is possible.
You seriously need to take a chill pill man. Actually don't - I find you obnoxiousness very entertaining