Listen to the whole message. It's about the crazy people who end up changing the world. Hence proven and famous.
(Meanwhile, from a storytelling perspective, it would be needlessly distracting to have to simultaneously educate people about some quiet unsung heroes. Your implied alternative version would be unworkable.)
(Meanwhile, from a storytelling perspective, it would be needlessly distracting to have to simultaneously educate people about some quiet unsung heroes. Your implied alternative version would be unworkable.)