Establishing culture is much more difficult than following it. For example, trying to write a show’s pilot is much more difficult than starting season 10. The jokes, the characters, and the overall themes have already been established. You just need to follow the formula. However, making that formula takes way more guts to establish.
It isn’t just with sitcoms. Nine years of blogs is much easier to write today because an identity has been established—day one of a new job instead of a retirement party. The first day of school is much more difficult for a new teacher than a veteran.
Because “this is how we do things around here.” Setting that tone isn’t written in the policy and procedures manual. We get to make up these invisible rules (if we are fortunate enough to not follow someone else’s).