I'll just say comedy is the most realistic aspect of human nature. People love to be sarcastic or to have been surrounded by sarcasm all the time. Whether it be friends, spouse, family or strangers, without a humor aspect of the conversation, nothing seems lively.
Even within the show business, whether it be a thriller or action movie or series, the whole production includes an effort to make the audience laugh once in a while. Because that's what draws people from inside. Some may just despise the whole concept of fantastic and impossible comedic act in comedy shows/series/sitcoms/movies but at the end of the day, no one loves a dull Tony Stark or a boring Suicide Squad or a serious Jesse Pinkman.