A ninety year old illegal alien who can’t speak English with a heart condition, history of stroke, bad eyesight, hearing aids, mental problems can legally drive a full size 15 ton bus converted to a motorhome through town inches from other vehicles and pedestrians and down a busy interstate at 75mph. But a 45 year old whose had successful lasik or other eye surgery might not be allowed to fly a thousand pound aircraft depending on the mood of the medical examiner. You can also be disqualified for being prescribed any number of common medications.
Thank you.