> I've never understood why it's seen as so important to understand what the original authors of literature meant or intended.

How could you even begin to understand the text without knowing what they meant? Surely not by free association! Recall those ancient epics you've likely read in school. What were they? Translations. Someone rendered the original text into your language for you. To do that, they had to first understand the original text. To do that requires understanding the language(s) of the original text. To understand the language(s) of the original text, you need an adequate familiarity of the culture at the time. This is extraordinarily difficult to accomplish competently because of the breadth and depth of background knowledge required. It is incidentally why there are multiple competing translations of ancient texts (it is said that translations aren't truly possible).

Now consider again the knowledge you need to interpret text in its historical context. If you've just unearthed some text from an ancient civilization no one knows much of anything about, this is going to be damn near impossible and full of speculation even when you manage to produce a plausible translation. There's also the question of the status of the text: what is it supposed to be? In the case of the Bible, you need the continuous Tradition through which to interpret it. You need to interpret it synoptically or run the risk of making ad hoc judgements unhedged by other parts. (This is why Sola Scriptura fails; not only is it self-refuting, as in, nowhere in the Bible is this principle declared, not that this would lend any credence to the claim, but you lack the interpretive apparatus to interpret the text in the first place, leading to all sorts of weird claims and inferences. Not only that, but the Bible itself was compiled in the fourth century in light of this Tradition. How else would you establish the canon if not by drawing on the Tradition?)

> They're fallible like everyone else, and therefore might be wrong.

Yeah? Check out the doctrine of biblical inerrancy. The Catholic Church states that Holy Scripture is free from error[0]. So your view is not universally shared.

> In terms of impacting people's lives for good, I definitely feel like religions are at their best when they are inspiratory

What is your view of religion, of Christianity? Its purpose? What is this "inspiration" and what is it for? What does it inspire? If your answer is "to become a better person" or something of that sort, then we must ask: how so? Either some truth is being communicated which makes you better by virtue of knowing it as well as the change it effects in you, or whatever is being said is fraudulent and useless and ought to be discarded (put aside partial truths for the moment). And because Christianity concerns the ultimate things, it means that all of your life is oriented by it, and it means that it must help you with respect to your ultimate end, something you can fail at attaining.

As I have written elsewhere, everyone has a religion, so the question is "is it any good?", which is to say "is it true?", and not "do you live by one?". Man cannot do without religion because he cannot live without an orientation or a direction in life, he cannot live without an Ultimate, so much so that he will fill that void with all sorts of garbage. He needs to know at least the necessary part of the big picture and a way of living in accordance with it. You may find bits of pieces of truth scattered among the religions, valuable insofar as they contain the truth especially about ultimate things, but Man does not subsist on religious dabbling. And here the Catholic Church asserts clearly its claim to the fullness of truth.

> and at their worst when they try to impose authority.

This seems to misunderstand the purpose of authority. The purpose of authority is to safeguard teachings from corruption and manipulation and make them available over the centuries so you don't end up with a proliferation of confusion and error. Don't let the centuries of caricatures of the Big Ol' Mean Church fool you!

[0] https://www.catholicherald.com/faith/what_is_biblical_inerra...