Reality can't just go onto the page and work as a book.
In real life (IRL for you gamers out there) people really do just taaaaalk about nothing. They talk about their daaaaayy or the weeeaaather...all the time! But that isn't the stuff of dialogue in fiction--unless it's meant to demonstrate something. A dissolving couple, for instance.
IRL, people really do just jet off somewhere and then come back and resume their life. They do just take up random hobbies or investigate friends' murders in lieu of the police (OK, not that one. Hint hint, amateur sleuth writers).
But not in books. Books have to be life, distilled. Only purposeful things go into a book. Dialogue and character decisions that move the plot forward.
Books are realer than life.