The point is that it all involves human interpretation. The act of reading words on a page is the act of interpreting marks as symbols of meaning. But as we all know, each of those words have a lot of different meanings, and we have to decide for ourselves which of those different meanings is intended. That's what "interpreting" is: deciding what those word-symbols mean in their given context. And this activity will produce an inherently variable result, because we each understand ourselves and the world around us a little differently, as we each experience it through our own unique lives.
One of the more important quotes from the Bible is from John, 14:6 - "I am the way and the truth and the life. No one comes to the Father except through me." But what does this even mean? The word "through" here cannot be interpreted literally, because we cannot literally pass through Jesus. For one thing, Jesus is not here for us to "pass through". And for another, even if he were here, we cannot "pass through" another human being. So the words have to be interpreted as meaning something other than a literal passing through a literal human being. But what? And why wasn't Jesus more specific if he intended his words to be taken so literally? Why didn't he say, "No one reaches accord with God unless he worships me"? Or, "No one reaches accord with God unless they live as I have lived, and believed as I have taught"? Or, "No one gains accord with God unless they follow the religion that will develop in my name after I am gone"? And yet these different interpretations are very common among Christians. And there are many other interpretations, too. So, if the gospels are so inerrant, and so literal, why is this important quote so vague and 'poetic'? Why is it so open to different interpretations? Especially when it purports to be telling us all how to gain accordance with God?
I think the answer is that these texts are not meant to be taken literally, they are meant to be taken "spiritually". They are meant to be read in the light of the soul, in the light of our unique experience of being who and where and what we are. And Jesus intended to be poetic because he meant his words to be an invitation to contemplation, and not a mindless statement of 'how to'. I think he meant his words to be taken in exactly the manner to which you are objecting. And because you are rejecting the myth, and metaphor, and poetry, and symbolism of the text, you miss most of the real, personally effecting, content. And more importantly, you are missing the fact that through the poetry, the words are able to speak to individuals on an individual level, as opposed to a 'one-size-fits-all' message to the masses.