The thing you can't let go of is gravity. The reality of gravity in writing. If someone says something really mean in a sitcom, and the next wave isn't a reaction to the reality of that, you start losing relatability. In a lot of romantic comedies, they throw out the rules of life.
“So much of our lives is given over to the consideration of our imperfections that there is no time to improve our imaginary virtues. The truth is we only perfect our vices, and man is a worse creature when he dies than he was when he was born.”