Linus Pauling's authority in chemistry doesn't make his cuckoo theories about Vitamin C any less cuckoo. Feynman may have been an important physicist, but that doesn't make him knowledgeable about education!
And, to be honest, there's a reason why there are memes about physicists' competence in other fields, like https://xkcd.com/793/.
As well as the texts based off his lectures. [1] His ability to teach was completely unreal. Those 'books' dramatically deepened my understanding of physics.
This is not quite accurate. I mean it is, but only in the same sense that a top 5 chessplayer in the world might regularly bemoan, with no irony intended, his inability to play chess well. There's a lot more context to his comments here. [1]
Seriously, if you are at all interested in physics - read the lectures and they will, with 100% certainty, deepen your understanding. Even on the most fundamental topics. For instance my entire worldview around the conversation laws changed thanks to those lectures, which in turn ties directly into the nature of energy.
Probably because a lot of us have read or watched his work and know first hand that it was extremely high quality. It's not like you have to take people's word for it.
The Feynman Lectures on Physics was used as the textbook for Caltech's introductory physics course for nearly two decades, and it is still used in some universities. I learned physics from it and have met many Caltech alumni who used it as their textbook, all of whom felt they learned a great deal more than "intuition" from it. So I am guessing you've never actually tried to learn something from it if you feel that way.
He taught a two-year introductory physics course at Caltech from 1961 to 1964, which gives him some experience with the matter though. He was known as "The Great Explainer", due to his ability to help people understand and more importantly, be inspired by science and the world around them*. His materials from those lectures were converted into "The Feynman Lectures on Physics",
a highly regarded physics textbook. so I wouldn't have chosen education as my example.
In support of 793 however, he didn't do well with bureaucracy so I'd not listen to his advice on how to run something that favored rigorous rule following even when the rules don't make sense**.
And, to be honest, there's a reason why there are memes about physicists' competence in other fields, like https://xkcd.com/793/.