Patrick,
I would have lost that bet too regarding the
oil pressure

It must be that the oiling system is so efficient that at 9 psi there is enough
oil movement to privet total catastrophic failure? It would seem like it might be a possibility at low rpms, I cannot imagine the damage that would occur at high rpms with low
oil pressure.
Where did you find that tie bit? You have too much time on your hands, go out for a drive!