It's like how expert athletes often watch videos of themselves or competitors (when applicable) to understand the nuances of their play - once you understand something very deeply the small things start to matter more, until they dominate the game.

If you are a master of UI/UX and you are observing a user doesn't go through the paths you've created its an opportunity - you might be able to learn something that would make your approach more successful across a host of different users that up to this point you clearly are not winning the game against.

If you take an antagonistic approach and curse the idiot for making you watch you have not even put on a jersey yet.