Yeah, that was sort of my point. As well as later civilizations in Mesopotamia have obviously repeated and borrowed from the tales told by the earliest writers we have...aka the Sumerians.
Your post triggered something I remember some 20+ years or so ago, reminding me of people from Scotland, who wanted to learn an old Scottish heritage tradition that is
forgotten in Scotland. It was an old tradition dance that is 'only retained' overseas in Nova Scotia. It's a phenomenon, that I suspect must be quite usual when people
take those traditions even habits, to far off lands, whilst still retaining them many generations after.
I remember hearing of a similar thing when I went to the South Pacific many years ago. I learned there were people of a particular island, who speak with some a 200+ year old English dialect, or phrases. In the states there are places or a place (I can't remember off the top of my head) that still speak in a particular English accent .
What I'm alluding to here is: Hebrews were from the same area, and I don't think this is the type of issue that some people think, to be the "dambuster smashing" the Hebrew narrative. The stories are similar - Gilgamesh is like Nimrod of the bible, and there's the flood similarities. Hebrews coming from those areas around ancient Iraq and for them to have similar stories is not really borrowed or plagiarised imo.