If someone is bringing up John Boyd in a serious capacity to make a point, it's likely they have no idea what they're talking about.
Why is that? Is Boyd not considered a serious source?
Boyd's role (and that of the fighter mafia in general) in the development of 4th generation fighters is very exaggerated. Bringing him up (and Feynman honestly) is a sign you're about to read some shallow self-help esque shloch.