Us humans keep reproducing without a care in the world. Some newborns make it out alive to get a chance in life and some die. It is the circle of life for us. Out of the womb into the tomb. We don't follow the rules of mother nature because we are dealing with better things (jobs, school, etc.)
This is an instance of dramatic irony, taking into account that this figure of spech is when the implications of a situation, speech, etc, are understood by the audience but not by the characters in the play.
