They also tend to be the ones who have only a superficial understanding of what their code/the language is doing, and to whom edge cases are an almost unknown concept. Those people would be well advised to apply the Feynman Algorithm more.
My understanding of the Feynman Algorithm was that it was basically a joke by Gell-Mann. Gell-Mann was pointing out that no one else on earth (even himself, a Noble prize winner) could work the way Feynman did, the joke being that he only needed three steps: (1) Write down the problem. (2) Think real hard. (3) Write down the solution. It was about the absurd brilliance of Feynman, not intended as any sort of useful model to follow.