It's not completely inapplicable as an analogy. Stare decisis exists in courts to create a sense of fairness & impartiality in the court, those are both good traits in a GM. Countries with courts that don't use some method of respecting precedent are typically called things like banana republic police state & worse with a reputation for being places you never want to be under scrutiny by taw enforcement as a well understood counter example to show the risks of ignoring precedent in decisionmaking that we regularly even get to see in movies/tv/fiction.
A lot of the 5e SA rulings were bonkers in conflict with past rulings & that created problems where it becomes difficult to build off both. That's called a
Circuit split when it happens in different courts, but this was frequently from wotc alone in 5e alone. You need only start looking at the ways they rule on & avoid ruling
on barding when it comes to mounts & animal companions vrs druids as a stark & concise example of it in action. Even when they finally broke down & admitted that there is nothing stopping a druid PC in rules or balance from saying "well no, screw that.. yes I will" they couldn't resist throwing in a jab along the lines of "the druid explodes"