OK let’s try it this way: Suppose you encountered an economist who argued like this:
[HYPOTHETICAL ECONOMIST HOLDING A STRANGE VIEW:] In a market economy, in competitive equilibrium wages are equal to the marginal product of capital. I can prove this to you mathematically in a simple model where physical machines can do all the jobs that humans can do, and so in equilibrium it must be the case that an hour of labor earns the exact same amount as an hour of machine-time. Moving beyond my formal model where I can literally prove it mathematically, intuitively we can see that wages are determined by the marginal productivity of capital because workers can produce more stuff with an additional unit of capital.
Now, I hope we can all agree that the above is utterly confused. But imagine that you met PhD economists who believed it quite passionately, and indeed there was a bestselling book on Amazon founded on the above framework.
I am being dead serious. Please take this thought experiment seriously, and tell me exactly how you would try to get the above economist to realize his whole framework was messed up, and he needed to not simply tweak it, but to jettison it entirely.