Hit the reply limit.

If your boss made you get a sick note anyway after the company stopped requiring it and they were billed, then that would be on his neck not yours. But I'm not interested in individual situations, I'm interested in the whole. Say there are a few hundred people working for the company in question. Prior to the company dropping the sick not policy, 100% of them would go to the doctor to get a note when they stay home from work - a requirement. But if it were no longer required, while some or even many of them still would go to the doctor, it's highly unlikely that all of them would keep going. It's common knowledge that there is no cure for the common cold, and many people don't go to the doctor for it for that reason. Is it possible that each and every employee would be in some weird personal position where they still decide to go to the doctor's office once it isn't required? Sure, in all the many universes there are some where that happens. But is it likely? Hell the **** no.

And yes, it is wasted time if they just have a cold, because there is literally nothing the doctor can do for them. It's the doctor's job to treat them but that doesn't mean jack when there isn't a treatment. In this case the doctor loses time, the patient gains nothing, and other patients are potentially exposed to a virus.