No pro will publish photos he doesn't think are good enough. It would be like a surgeon showing his face lifting failures in an ad. "Let me redo your face. I promise it will come out better."
Don't you mean he or she?

Do you think that every photo opportunity only leads to a single best photo?
Do you think HCB thought that?
Have you never looked through a number of photos from a photo opportunity and had trouble choosing between them, because there are several with strengths that you value?
Have you never taken a number of photos and been proud of and been happy with several.
From a professional's perspective, have you never done a shoot that results in so many different but excellent results, that you are keen to show several to prospective clients, because they can see the breadth and depth of your vision and creativity, and how varied your results can be. Many clients insist on results that give them choice.
My best photographic experiences result in several results to choose from.
And I expect HCB was as uncomfortable with the attention to "decisive moment" because of the implication that it was necessarily limited to one, singular moment.
Real life is full of things that have lots of different moments that are decisive in many ways.