They are two very different activities, both just contain rules.   It’s Chess vs Cowboys and Indians.  Chess is a foundation of rules and every action is governed by the rules there is no outside of the box, no real arguments to be had about what that piece can do.

In Cowboys and Indians you have some rules but most of the game is happening outside of those rules and it’s only when there is an event that the rules come into play.  Where the arguments come into play are when players have different expectations of what should trigger an event and in many cases in what rule governs it because the action isn’t always cut and dry..  Is that an attack, did it get surprised, oh I have to make a climb check to get up that tree etc…

RPG”s don’t have a rule for every action and because of that they are subject to interpretation and previous experience.  Which usually means that someone is being told they are wrong with no cut and dry proof behind it.  Just my feelings and my experience vs yours.