Imagine being the smartest person on the boat and dealing with people that can not help themselves.
For example a big strapping deckhand from California with a Bachelors Degree, asking you to get his sock draw open, because he can not manage to do it.
A stewardess that can not remember how to operate the audiovisual systems, from the IPad remote controls.
Explaining to a captain how to transfer command of the propulsion systems, from the bridge to the wing stations and back.
And finally explaining to an owner why preventative maintence routines area series of reoccurring tasks,