"Inerrancy" used to mean simply that the Bible could only lead you to Christ - not, say, to false worship. The idea that the Bible is 100% factual in every detail, even when two stories differ in details, is a modern invention.
I think the Bible is words God chose us to have, but that much of it is a record of our relationship with God, provided, not because every last word is the best possible guidance, but because studying it, and learning about the path people have taken as they've approached God, is very instructive.
I have no problem with the idea that there are occasional trivial errors in the Bible, such as the claim that the mustard seed is the smallest seed. Immense effort goes into explaining these away, but this misses the entire point; it turns into an attempt to make the Bible into a proxy for God, rather than a book that guides us.
It doesn't matter much, really - it turns out that, no matter how clear the Bible is, we'll introduce plenty of errors by simply not understanding it. The Bible is the story of God saying the same thing time and time again, and having people just not get it.