Most TV sitcoms (situation comedy) are just not funny. Period. The audience is prompted to laugh whenever the fake laugh track is switched on. Funny or not they laugh on cue because it's the only joy in their miserable lives. It's the one thing they look forward to at the end of a long day slaving away in the rat race.
Many of them all alone and suffering in quiet desperation longing for any kind of happiness, find solace in sitcoms. But the jokes on them because the producers are making fools out of them. It's reverse entertainment where the producer laughs at the funny audience who are laughing at a sitcom that has no humor whatsoever.