True. And others are inclined to think Abraham is fiction. If he were historical, in a semi-historical setting, that would amount to a kind of verisimilitude; not to history.
At least some details about him are fiction, such as his impossible age at death of 175, and his age of 99 when begetting Isaac. His begetting six sons by Keturah at an age of over 137, after the death of Sarah, makes a nonsense of the supposedly miraculous begetting & conception of Isaac over 30 years before, and is extremely creepy, given his very great age of 137.
Actually there’s an historical event that fits the Babel story: the great ziggurat at Eridu would have been the largest ziggurat ever and may have rivalled the pyramids – if it had been finished, but it wasn’t. The situation involved multiple languages and an inability to communicate and was connected to a city being abandoned and (the) people scattering. With that information, the account strikes me as a story saying, “This is the rest of the story”, i.e. this is what was really going on as opposed to just the bare events.
Which is interesting, but is it appropriate to the Babel story for us to try to fit historical details to it ? One could, if one were so minded, interpret volcanic eruptions as caused by giants imprisoned by Zeus after the war of the Giants against the Olympians; but that would hardly be an adequate explanation of volcanic activity. If a story is meant to be a myth, it should be accounted for as an historical event. And it seems safe to say that the Babel story is a myth; even though it may have been influenced by realities such as ziggurats.
I think the story makes equally good, or better, sense, if taken as a Jewish parody of the sixth tablet of the Enuma elish - the so-called Babylonian epic of creation. The gods who build Marduk his ziggurat in Babylon, his chosen city, become - on this hypothesis - merely human builders in Genesis 11.1-9. If that is the case, it would agree with what seems to be, in Genesis 10, the reduction of the gods Ninurta & Asshur to merely human status, as Nimrod & Ashur. The name Nimrod seems to be a polemical distortion of the god’s name, for the root MRD in Hebrew = “rebel”. Just as Akkadian Bab-ili, “gate (i.e. city) of god”, is distorted by the author of Gen 11.1-9 into BLL (“to confuse”,)