Fame
Commercial divers aren't destined for fame—we can't even see their faces beneath those bulky masks. For all we know, it could all be the same guy who just happens to be super busy all of the time.
No one will care that you replaced six bolts on the Skyway Bridge last October that probably didn't need replacing anyway. Except for maybe your friend Bill, but he's always been your biggest cheerleader. Bill's weird like that.