Taking an absolutist stance is the point of the authors experiment. You wouldn't do this in practice if you were just trying to improve your privacy, but in an

Taking an absolutist stance is the point of the authors experiment. You wouldn't do this in practice if you were just trying to improve your privacy, but in an experiment to see just how far Google's reach extends it makes sense to block everything and see what unexpected 3rd party services also fail - such as Uber or Dropbox