Shipwrong
A man who started out his career building ships, but with no notable successes. When he wondered aloud what he should do to get better at his craft, AND on his craft, he was assured "Whatever floats your boat!". Lacking any success at doing just that, he replied: "Nothing, absolutely nothing!" will do that.
"Sharkie", was just not very handy with tools, and so, when he apprenticed as a shipwrong on the Titanic, everyone knew he had finally found his true calling.