instrumentalism
Completing or approaching an activity to be practical rather than absolute because you're living a grey-coloured life.
"Have you ever heard of instrumentalism?"
"Nope."
"In short, it means that for a person like you who has no particular interest,
just by observing the fact that you have not joined any club here in Kamiyama
High, the Holy Land of high school club activities, makes you a grey-coloured
person."