Since most techies seem out of touch with how physical data storage used to work...
Your medical records may be a ream or two of paper. They don't get stored at your doctor's office, your doctor's office requests the records it needs on a daily basis. Medical couriers exist to handle emergency requests. Your data is stored in a warehouse with perhaps hundreds of employees. The threat model is different, not absent -- everybody from your doctor's receptionist to the warehouse workers have access, and can read or modify your data.
Your medical records may be a ream or two of paper. They don't get stored at your doctor's office, your doctor's office requests the records it needs on a daily basis. Medical couriers exist to handle emergency requests. Your data is stored in a warehouse with perhaps hundreds of employees. The threat model is different, not absent -- everybody from your doctor's receptionist to the warehouse workers have access, and can read or modify your data.