You've hit on the primary shill detection mechanism, which applies to this subject and many others.

You see proponents of both narratives everywhere, but you never see proponents of one of the narratives using it to argue against proponents of the other. This tells us that both are false narratives, and their proponents are shills. Oh, or dumbasses that bought into one or the other shill narrative.

If the shills start arguing with each other to simulate an organic discourse, cognitive warfare costs would skyrocket, and they won't be able to keep their own narratives straight. They will never bother. Plus, they know the rest of us would have too much fun watching.