The director's job is full of all sorts of annoyances and details - like how many cars are on the street. Ugh. I don't want it. I like my gig. And I feel that for the next 30 years or so I can keep learning more about it.
Few things are harder to put up with than the annoyance of a good example.
People who think they know everything are a great annoyance to those of us who do.