The theory doesn't surprise me a bit!
As to a genetic inter-linking : would explain a lot.
Any of you watch SciFi TV like Trek and Babylon 5 et. al?
Never seen one yet where there isn't an adventure which ends up with a bunch of inimical and varied life forms seeing a 3D image of some vanished race which tells them they are all related as the long-vanished one had sent their genetic material throughout the many universes. Each of course refuses to believe they are any way related. Typical! EXCEPT in Babylon 5 where the Minbari believe their souls and the souls of the Earthers are interlinked. Very advanced race, the Minbari, of course.
Panspermia in action!
OK ! Don't groan.
So it's sci-fi ... just another type of modern myth-making. I do not think Campbell would argue with that.
And why would the idea occur to all the writers of varied programs ... sure they read science journals ....BUT....
Oh, never mind, I am going away for now
