So when I was told to work, ten, twelve hours a day as an assistant pro, I didn't complain. It was normal.
I find it enormously valuable to be sure that that the pacing is what I think it is and that the scenes have the shape I think they have musically and dramatically.
From the naturalistic point of view, all men are equal. There are only two exceptions to this rule of naturalistic equality: geniuses and idiots.