Different directors have different styles of directing, such as Clint Eastwood just says begin when you are ready, he doesn't bother with "action" or "cut." That is not the usual way of directing;
the actors/actresses have to learn to adapt with all the different types of directing.
Billboards show pretty faces but in reality actors/actresses are just normal people like you and me. Actors/actresses have to earn their living just like all of us.