Could you tell the triage nurse in the emergency department all the medications your elderly parent is taking? Before you go to Bali this winter, do you know whether you’ve ever been vaccinated against hepatitis A? And what was the name of that antibiotic you were allergic to years back?
All this information exists, most likely in the files of a GP or specialist, or a hospital you went to for treatment a couple of years ago. It is probably even stored electronically, but can you get it when you need it?