I wonder outside of his namesake, that the title of this series is alluding to this sort of duality.
He's human, made human, but was transferred and at least in his case was given 'abilities.' And let's say outside of godly whims, there is a 'price' or weight in order to transmigrate humans. For all we know, he could be 'human' but was remade as a monster like how they are spawned in games. And outside of the UI where he can view and to some extent guide his growth, maybe the other humans that were transmigrated had the same principal of quickly amassing abilities from monsters, but never understood those rules...