My point is that we can ignore Plato's lost city account and just consider the possibility that their is a lot more water on earth than there used to be. In that case "Atlantis" would be a generic term for the civilization that used to be but is now lost under the ocean. Could be several cities that used advanced navigation and building design, etc. -- and that may be where the astromony used in building pyramids on both sides of the ocean came from.
So let's not let Plato be our guide to prove or disprove anything at this early point. But why not scientifially pursue the general notion that his story may have stemmed from an oral tradition that was an account of history.