They've been trained to focus for weeks at a time on a single goal. They know how to clearly identify obstacles and form step-by-step plans to overcome them.
They're obsessed with improving specific skills but judge success only by overall progress made in the world they've decided to conquer - as realistic or fantastical as it may be.
It's precisely these traits that make video-gamers great bodybuilders.
Take a moment to laugh, if you must. Now hear us out.