Well, of course they are open minded, or else they wouldn’t be rethinking things.
Of course we first postulated a gene as a single entity, that represented a single condition. Then as additional information becomes available, additional complexity is discovered.
By contrast, religious approaches seem to have a lot of trouble with the rethinking part.
Plenty of religious folks (e.g. a series of Popes) have revised their thinking as discoveries have been made.
I even think there's sufficient information coming on line here to drive out the "creation once" crowd within months ~