Pure crap, unadulterated by any understanding of the event. McCrap had no choice, if he had accepted the offer to go home early, what exactly would have been his career choices? His family name, after two Admiral forebears, toast. This legend is merely spin, putting lipstick on the pig.
So while he's laying there, being tortured with broken bones, it wasn't duty or honor that drove him, but concern about his future job prospects. I hadn't heard that spin before.