Earlier quoted context omitted.
The way i look at it is that written language itself is a translation of an idea onto a page. Something is lost or atleast becomes ambiguous without an interpreter or a teacher or at the least, a detailed commentary. This is not that much of problem for a casual piece of text but for something that has much more potential impact, it's huge. Translating laws or perhaps the constitution of a country can all but change…
This is probably why we put so much emphasis on precedent over the actual text of the law. Likewise with the bible, perhaps not as much with the christians at least these days, but the Jews have their talmud that interprets the book ad nauseum through centuries of rabbis spitballing their interpretation of the base text, ending up with things like a string hung from telephone polls to represent the walls of the templ…
I have heard something about the Jewish history of making these kinds of interpretations to "work around" scriptural laws. I think it was in a book by Israel Shahak where I first came across it.
In any case, yes. Precedent is important and even though it's not fully reliable, we will usually have a lot of stuff that cancels out errors.