Why might a crowded waiting room be a sign of inefficiency rather than the provider's popularity?

A crowded waiting room is a sign or can be a sign of inefficiency because the patients that are present and have come may see the crowded room in which there are a lot of patients waiting for them to be seek out by the physicians that will likely made them impatient and to do as they don’t know if whether they could wait or if the physician is even present.