I mean, that's not really AWS's problem, is it? Outages happen. If you have a mission-critical service like health care, you really shouldn't write systems with single points of failure like this, especially not systems that depend on something consumer-grade like S3.

This appears to be a normal doctor's office where there are routine appointments. Emergencies would be referred to the ER anyway. And while I obviously don't know the details of how his office is run, you'd think that you could get by on a pen-and-paper fallback to manage the office. Maybe that's an advantage to keeping experienced office staff on board.