Jesus did not fit the prophecies either. The point of prophecy isn’t prediction, it’s a tool to be used to make people believe what you want. For example, Jesus of Nazareth was almost certainly not born in Bethlehem, but that’s what the prophecies said so we have multiple differing mutually exclusive accounts saying how and why he was born in Bethlehem for some reason during a trip they took. They don’t really make sense, especially together, but they don’t need to. They were just created in order to fit a person into the prophecy.

Not that Dune proves anything, but I highly recommend watching (and ideally reading) it because this concept is basically what it’s about, and it’s entertaining and well done. A prophecy was laid out in advance to be used when needed. It is then used to convince them Paul is their Messiah, and billions of people die because of it.