In 1999 a little study was conducted in Germany using ketchup. The Germans who were formula fed as an infant, preferred ketchup that was scented with vanilla than the Germans who were breast fed as infants. Those who preferred the vanilla scented ketchup did not make the connection that how they were fed as infants influenced their later in life ketchup preference later in life. (Citation). It is a silly little example of something that we all know - what foods you like and dislike are influenced by your experiences.
We accept this about our tastes in food as well as of other things that are even more silly. For instance, expecting parents will not give their baby the same name of someone they know and think is a jerk. There was no way our boys were going to be named Ryan or Eric for this exact reason. We all know that there is nothing wrong with those names but our experiences, even irrationally, affect our decisions.
The same is true for understanding the Bible. We want to think that we can objectively read and understand the Bible. We want to think that we "just looking at the scriptures" when we try to understand them. We want to think that we can read the Bible in isolation of our experiences. Additionally, we tend to think that others are more prone to allow experiences/culture to influence their interpretation of the Bible than we are.
I think vanilla scented ketchup sounds disgusting, I am not sure that I want to call it real ketchup. However, many others believe ketchup without vanilla scent is incomplete ketchup. Both sides are unaware of how their infant diet affects their understanding of orthodox ketchup.
Maybe our understanding of what is orthodox is less influenced by a rational and objective set of decisions, and more about experiences we never would imagine would matter.