I've actually asked this question a lot myself. If so many sects exist, and every sect exists distinct from another sect because they believe a specific interpretation of the bible over a different specific interpretation, and every sect says that their sect is the one who has the correct specific interpretation, they can't all be right. If we follow the logic:
Truth is fixed, specific, and singular, it doesn't change (if denominations didn't think it was specific, they wouldn't have very specific doctrinal views). If truth is specific, fixed and singular, then out of all the interpretations of the bible that can possibly exist, there is only one that's true. If there is only one specific truth, then the vast majority of the specific interpretations of the bible are wrong. It is only possible for one specific interpretation of the bible to be correct. If every denomination asserts its specific interpretation of the bible is correct, then either:
They are all wrong;
One is correct;
They are all partly correct and partly wrong;
or truth is not singular, fixed and specific.
If they are all wrong, then none should be followed. If only one is correct, then how can we possibly know which one, since all denominations assert their correctness? If they are all partly correct and partly wrong, then what difference does it make if we follow one or the other? And if truth is not singular, fixed and specific, then there's no point even trying to speculate on what the singular, fixed, specific truth is, because it doesn't exist.
I still haven't found a solution to this problem. Has anyone else?