He has a lot tied to the Theater just in the names of his abilities as quoted here:
{quoted}
Guys we all must remember that there are many kinds of art. Jhin is obviously not a painter or sculptor he is a play-write, director, or actor. Just look at the names of his abilities:
"Whisper" has to do with speaking( but that one give the least evidence).
"Dancing Grenade" the performance of a dance on stage in often in plays and always in ballets.
**
"Deadly Flourish"** is about the most psychopathic artist thing you can get, also flourishes are any thing that makes something better or more artistic.
"Captive Audience" continues with the theme that he is somehow involved in theater, and it is a play of the saying captive audience, which is and audience with no choice but to stay and watch the performance, but here it is much more literal.
"Curtain Call" is an actual thing in theater where the actors names are called out and then they bow to the audience. this happens the end of a performance which is why it was chosen because it will be the end of someone's "performance" or life.
Come on guys we need some perspective.