Part of the problem with healthcare is that healing a living and complex system like the human body is difficult; there are many possible problems and many possible solutions. The healthcare system has its many flaws from financial, labor, equity, and other perspectives.
The simplest transaction of the healthcare system though - one patient in a room with one doctor - is fundamentally flawed. As much as we hate to admit it (and the doctors surely would), humans aren’t that intelligent and no one person can know everything that could be wrong with the human body, much less prevent their own history, experience, and bias get in the way of being right. This is where collective and collaborative problem solving and decision making has real value.
I consider policing to be a structurally similar issue as it also contains one person in a position of authority or power of judgement and one person in the position of giving their own perspective and narrative (generally highly discounted by the person of authority) and waiting to be judged.