In an effort to defend their authority, many false Churches discourage, and in some cases explicitly forbid any attempt to study the Bible without their "help". The Watchtower, for example. The Watchtower organisation teaches "Thus the Bible is an organizational book and belongs to the Christian congregation as an organization, not to individuals, regardless of how sincerely they may believe that they can interpret the Bible." (1)
In order to defend their authority, false Churches often point to the fact that there are a wide variety of other interpretations of the Bible. Effectively, the logic boils down to "there are too many interpretations of the Bible, therefore ours is right".
Setting aside the abysmal logic of this argument, consider this: Even within the strictest of denominations, there are a diverse array of opinions. No two people will ever agree on every issue great and small. This is simply because no matter how hard you try, you will never overcome the interpretation problem. If someone interprets the Bible for you, who will interpret the interpreter for you? Either you will interpret the interpreter, or someone else will, and then you will have to interpret the interpreter's interpreter. No matter what you do, even in an infinite line of interpreters, you will always have to be the last one. So the question is, how many interpreters do we need between us and the Bible?
As a believer in the Perspicuity of Scripture, I believe every Christian has the right to read the Bible, and will have the ability to understand it, especially when helped by the Holy Spirit (1 John 2:27). Yes, there are complex issues, but there are also significantly less complex issues. Some interpretations of Scripture are irrefutable. The belief that there is one God, the belief that Jesus is God, the belief that Jesus was 100% human, literally died, literally rose again, there is no sensible way to deny any of these things when presented with Scripture. Conveniently, these are things that very often are denied by the Churches that claim to have sole authority to interpret it. Suddenly we understand their motives.
Now, as a human being, I am obviously not perfect, but God is, and so are His Scriptures, and so it is entirely reasonable for me to believe that if I study the Scriptures, I will gain a greater understanding of the truth. I also have reason to believe that another person, studying the same Scriptures, will come to the same, or at least similar conclusions. This is more than just a good theory. In practice, it works out very well. I know Christians from a wide range of denominations, and while there are minor disagreements on the more nuanced issues, it's not common for me to find a Christian I can't reason with. Whether we be fully agreed, I change their minds, or they change mine, it seems almost easy to just study the Scriptures and use them to align our beliefs. Unity is rarely an issue, regardless of minor differences between denominations.
But what about those minor differences? Or even the major differences. I can't deny they do exist. Obviously, I would argue that motives play a large part in the bigger differences. But a dogmatic Church could claim it's because we don't submit to their authority. So, how does this work in theory? Well, as I try to illustrate in the diagram above, not very well. In theory, this doesn't solve the "problem". Rather, it expands it. If I was to abandon Perspicuity and allow a Church to interpret the Bible for me, all that would mean is that I would have to interpret the Church, whether I interpret them along with the Bible, or just throw the Bible away and listen to the Church exclusively.
In practice, this works about as well as you would expect. I see more division within many denominations than actually between them. This problem is so major that it is actually illogical to walk up to someone who professes a specific Church and then say "therefore, you believe this". It is possible to say "this Church teaches", it is not possible to say, with any degree of certainty, "this believer believes".
So, what's the real solution? Really, it's to cut out the middle man. Pick up a Bible and test your Church, and even yourself, against it. The Bible will not always agree with you. If you think it does, you haven't been reading it. But the right thing to do is treat it as a book. Let the Bible inform your worldview, rather than letting your worldview interpret the Bible. Everyone who takes this approach will be united in the same faith. Everyone who doesn't will inevitably fall into error.
References
1. The Watchtower, Oct. 1, 1967, p. 587