Do you ever think about that? It is a completely reasonable and common concept that any story, any tale, any report, any recollection of events, any film, picture, song or other piece of art, must have a topic. If that is not apparent to us, we ask: "what is this about?".
Meanwhile, anything that happens in life just isn't really about anything. Most things just happen. Sure, things happen for a reason and often with a certain intention, but those are always subjective to all individuals involved and not objective facts about the thing that happens. Instead, its what the recollections of those individuals will be about.
Here's an example: Let's say you want to make lasagne, so you go to the store to buy canned tomatoes, but they are sold out. You might tell this story to other people, but what this story is about depends entirely on the context. If you meet someone you know right outside the store, you tell them this story, and it's about why you are frustrated. If you talk to the people you wanted to have dinner with, it's about why there's no lasagne tonight. If you talk to customer service on the phone, it's about why you think that this supermarket should keep a more consistent stock.
Despite this dependence on context, you sometimes find yourself standing in the supermarket, all by yourself, in front of an empty shelf that says "canned tomatoes", and ask yourself: "what is this about?".
It's not about you.
