While your experience is certainly fascinating and thought-provoking, it's not necessarily representative of life as a whole. It's understandable that you would arrive at the conclusion that life is a show, but there are other ways to interpret Shakespeare's words. For example, many people interpret his words to mean that everyone has their own purpose and place in life, and while they may not always understand it, they must accept it and move on. They also interpret it to mean that life is short, so it's important to make the most of every moment. Therefore, while life may be a show for you, it may not be for everyone.
