Typecast

Super Mario Bros. is really just about being defined by your job. Super Mario is a plumber who kills goombas by jumping on them to save the princess, but all anyone really mentions when they explain what he does is that he's a plumber. In exactly 0% of the games he's been in over the past two decades has he ever fixed anyone's plumbing. No one has ever called him on their cell phone to come over an unclog their toilet. He's officiated boxing matches, played tennis, gone to parties, brawled with lightning rodents and raced cars on rainbows, but he hasn't used a wrench to tigten a seal on a pipe. In the TV show starring the professional wreslter from the Cyndi Lauper videos and the movie no one wants the remember, his carer as a plumber is part of the premise, but it's nowhere in the games except for perhaps the earlies manuals. Even his brother, Luigi, who works with him is better known as an amature ghostbuster. The Three Stooges have had a more successful carreer as plumbers, even though Curly keeps getting himself trapped inside of the pipes. When you play Super Mario, the only reference to plumbing comes in the form of the pipes scattering the landscape, which oddly have fire-breathing Venus Flytraps growing out of them.
Mario is so much more than a plumber, but that's all anyone cares about. You have to have a title, and that's his.