The main character, the lawyer, made a speech about half-way through to that effect. We are all losing our children. It is a cycle that perpetuates itself every time we are born. We ourselves are living monuments to our childhood. None of us are the innocent babes staring big-eyed into our parents' faces that we once were.
Transition is tragic and necessary.
At least, that's what I got out of the film. Superb piece of work. Go see it. It opened yesterday and I saw it the first night. Slow your breathing under the nicotine sky.