why on earth would anyone want to fly beyond 65?
That's an easy question. Many pilots retain their love and enthusiasm for piloting an aeroplane until the day they die of old age. The greatest thrill of my life was as a 21 year old with 220 hours flinging a Mustang around the sky between towering Cu doing a tail chase on another Mustang. How can that experience not live with you? I still long for those days. I flew an ultra light a few weeks ago and still got a thrill at doing a neat crosswind landing.
In Europe I was pushed out of airline flying 23 years ago because of the age 60 rule but still look up in envy an watch the Boeings and Airbus coming down the ILS at the airport near my house. Other pilot retirees I know are perfectly happy to spend their lives pulling garden weeds and complaining of rickety knees. Horses for courses.