Ya, so I'm divided on this. Yes I think traditional medicine is anti-science hogwash but at the same time there also seems to be a case for working with these healers, even just to help the people who do believe in it.
They have an interesting way of dealing with things in clinics where people believe in traditional medicine.
If someone comes in saying that they are infected with evil spirits, then the doctor checks them out medically, if there is no medical issues then they tell the person they can go to a sangoma to treat the issue.
It sounds like they are being dismissive but in reality it helps build a relationship where people trust the doctors to help them if they can. If they really are possessed by a spirit then the sangoma can help them.
"Evil" spirits exist our side of medical science, so there is no treatment for them.
Infections and illness do exist in medical science and they have treatments for those things.
Also, incorporating traditional healers into the system could help rein them in.... and avoid some of the more outlandish treatments they use.