The post I characterised as effectively formalist argued things like
It's not that it has to simulate reality. It's that a simulation has to simulate something. Anything. For something to be "Verisimiltudinous", the system has to actually inform the narrative. And in D&D, it never does. The system in no way tells you what happens. Combat is the easiest example, but, anything else works as well - skill checks, saving throws, anything. Nothing in the system actually informs the narrative.
If you fail a climb check, what happens? If you are at the bottom of the climb, then nothing happens. You simply do not move. Why did you fail the check? What caused the failure? Who knows? The system tells you nothing.
To say that "the system has to actually inform the narrative" is first of all to exclude from "system" the rule early in the PHB that "The DM Narrates the Results of the Adventurers’ Actions." Assuming such an exclusion were acceptable, it must then discount from game play any going beyond the rules by the players.