You're quite right of course, Iains. Very specialised jobs such as doctors, teachers. nurses, plumbers, electricians and so on will always require specialist training and knowledge. But a lot of this can be polished up and acquired by experience during the Probationary period after the degree. In my case, I was a Probationer Teacher for two years (in Scotland) My sister did a year's clinical experience (being on call in a hospital for over 100 hours a week sometimes!) Apprentices are usually attached to a time-served 'master' until they have enough working knowledge to go it alone. All this counts as 'education' in my view.

I think the secret is never to stop learning. When my elderly father died, he had been studying French and bridge, and going to several evening classes. He was also learning about car mechanics.
After retirement, I decided to learn British Sign Language, and Mandarin Chinese, and attended several short courses about Geology of the Hebrides, Medieval Cathedrals of Europe, The Life and Times of Charles Dickens for example. I even gave three lectures myself to our Ladies'Group:- 'Travels In West Africa', 'Prison Visiting' and 'Edinburgh Royal Infirmary'.
If one can keep on being incurably curious, one will naturally seek knowledge and one way or another keep on learning.