But you should be shot down on that IMO

. Because individual humans are the
problem when it comes to Truth-that's why God must reveal the truth to us to begin with. But His revelation, itself, part of which is recorded in Scripture, becomes the
source of disagreement when individuals are interpreting it privately-and as Scripture is the sole accepted source of revelation for Protestants, disagreement is inevitable. But in Catholicism, the
church is the authority on interpreting revelation, not the individual. In this case there's a place where the doctrinal buck can stop, guided by the same Holy Spirit, the same God, who established the church to begin with for that purpose. God revealed Himself-and yet humans disagree on that revelation. Or they ignore it, carrying on the family tradition that Adam initiated, of failing to heed God and then going their own way, rooted in ignorance and pride.
So, it's the official teachings of the church, the church that received those teachings, whether in written form or orally, at the beginning, that accurately reflect God's nature and will for man. When Catholics disagree with
that, then they're not being very Catholic; they're disagreeing with
Catholicism. So, whether or not you agree with the notion that the church has that kind of unique authority and is Spirit-led, you can see that there's a difference in
kind in comparing disagreements among individuals with that of such an entity.
OTOH, the church is just one more opinion in the whole scheme of things and not unlike, say, Lutheranism, in that manner. But it’s an opinion that has a much more solid basis for validity IMO, because it doesn’t come centuries after the fact, fueled almost exclusively by private interpretation of Scripture alone. And the RCC unashamedly claims that the authority to correctly interpret God’s Word, again, both written and unwritten, is the role she was given to play. Incidentally, everyone who picks up the bible and claims to understand and interpret it correctly, regardless of how much they may disagree with the next guy on its interpretation, is implicitly claiming the same infallibility whether they acknowledge that fact or not.
That’s a good and valid question. But the catechism has that very purpose, to clarify and explain God’s word whereas the bible was never intended to serve as an exhaustive, systematic, and clearly stated catechism. So, misinterpretations are
much more likely with the bible. I find that people as often as not simply ignore the catechism when they disagree with it. However, again, being in the hands of us weak and limited vessels certainly means that misinterpretations can still occur.