The Aperture Problem
Nearly everything in American healthcare must pass through one narrow opening — the patient's care team, narrowest at the scheduled visit. Because that opening is finite, demand that cannot fit through it is silently refused, and refused demand lands on patients and their families as unpaid coordination work.
The aperture is not an accident or a failure of will. It is the consequence of building a system on trust and the prevention of harm. Scope of practice and licensure are the anchors, and they are the right anchors. But once trust, diagnosis, treatment, payment, documentation, and legal authority all live in the same place, that place becomes the only door.
A finite door forces rationing. The system responds rationally: it maximizes what happens inside the visit, and it builds a halo of virtual work — portals, call centers, outreach campaigns — around the same opening rather than opening a second one. Two decades of digital health have made the aperture more efficient without making it wider.
What gets refused is not clinical care. It is the surrounding category: questions, coordination, navigation, reassurance, follow-up, the work of keeping track. That work does not evaporate when the system declines it. It transfers. Coordination burden is the system's overflow, privatized.
The aperture problem is the supply-side view of the same thing the three clocks describe from the demand side.