It is also a matter of choice. I don’t remember any news trivia, I don’t engage with "people news" and, to be honest, I forget a lot of what people tell me about random subject.

It has two huge benefits: nearly infinite memory for truly interesting stuff and still looking friendly to people who tell me the same stuff all the times.

Side-effect: my wife is not always happy that I forgot about "non-interesting" stuff which are still important ;-)