Quote from ByLoSellHi:
1) Who believes this is generally true?
2) Who believes this has applicability to traders and/or investors?
Seems the only one's defending teaching rather than being able to do are the teachers!! No surprise there!!
Let's suppose you are on trial for your life. Would you retain a lawyer to defend you that has 30 plus years in criminal law with a very high success rate, or a law professor who has never seen the inside of a court room?
How about if you need open heart surgery? You want a doctor with years of experience performing the same operation again and again, day in and day out with high success, or a University Professor doing the procedure?
And guess what! Civilians who wish to obtain a commercial pilot position usually teach flying for several years before they are even considered for the most elementary flying positions.
Do you want Warren Buffet to personally manage your portfolio, or the local college professor who teaches finance?
As for trading, how many people who have made millions in the markets are now teaching versus those who have blown up and are now posers selling an "education" in how to trade the markets?
As a rule, those who cannot make it in the real world for whatever reason, usually resort to either teaching in some form or find employment with the government.
Your question, in essence, is a stereotype. And as painful as stereotyping may or not be, as a famous philosopher once said, historically, stereotypes typically prove to have a loud ring of truth within them.