Day surgery centres have two customers, and only one of them is the patient
A day care surgery centre sells theatre time, and theatre time is bought twice. The patient decides whether to go ahead with a procedure and where to have it. The visiting consultant decides which centre their list runs at. Lose the patient and you lose a case. Lose the surgeon and you lose a list every week.
Most centres manage the first relationship informally and the second one entirely by memory. There is no record of the consultant who has mentioned turnaround delays twice, no view of whose case volume has halved, and no prompt to meet a surgeon before the lists have already moved.