I think the one thing this picture shows that's new is the psychological disproportion of the kids' demands on the parents. Parents are often at fault, but the kids have some work to do, too.
But you can't show some far off idyllic conception of behavior if you want the kids to come and see the picture. You've got to show what it's really like, and try to reach them on their own grounds.
An actor must interpret life, and in order to do so must be willing to accept all the experiences life has to offer. In fact, he must seek out more of life than life puts at his feet.
When an actor plays a scene exactly the way a director orders, it isn't acting. It's following instructions. Anyone with the physical qualifications can do that.