General Anesthesia for a Hair Transplant

Why can’t the procedure be done under general anesthesia, to avoid the shock loss associated with the local anesthesia and the epinephrine used with the local anesthesia?

General anesthesia has risks that local anesthesia doesn’t have (the death rate is about 1:20,000 people). In addition, hair transplants are very long procedures, and general anesthesia would cost a lot of money for 8 hours and put you at more risk than needed.