Why don't elite soldiers and Navy SEALs have physiques like Dwayne Johnson or Vin Diesel?

The Gentleman pictured below, is one of the original members of Delta, probably one of the Absolute utter Badasses to Ever wear the Uniform. Command Sgt Major Michael Vining… Take a GOOD look at his Photo. You don't need to be built like Those ACTORS, to do the real job in the Real world.

Take a GOOD look at this man…there are a bunch of assorted deceased folks who underestimated this man because of how he looked.