I think it's part of the package.
A job like that will set you up in regards to speaking with patients, showing that you're not afraid to get your hands dirty, knowledge of how a hospital works, knowing how much it sucks to be an inpatient.
Work experience, however, tells you about the job as a doctor, their responsibilities, how they work with other members of the team. It tells you whether or not you actually want to be a doctor.
They both have different purposes and ideally you need both experiences.