Thank you for that observation. I am a medical coder/biller. Billing Medicare and Medicaid is already a nightmare of rules and regulations that nearly require a healthcare attorney to follow. Socialized medicine could only be worse. No payer is going to cover every procedure.
When it gets turned over to the politicians, everything will be based on number of votes. Free flu shots for everyone would be covered while expensive treatments for rare disorders would not be --- not enough votes to gain. And of course politically correct diseases like AIDS would be covered more than something not as glamorous.