Some Christians do not think they interpret the Bible. Sounds crazy, but there are Christians who think everything in the Bible is crystal clear and their interpretation (though they don’t use the word!) is always the right one.
There is a critical need to remember that there is clarity and wide agreement among Christians on the most important doctrines like the trinity, deity of Christ, bodily resurrection, etc. However, on lesser issues of importance like the age of the earth or when and how to baptize, there are a variety of views.
I don’t agree with many things Rachel Held Evans says, but she does a good job here describing that we all interpret…whether we are aware of it or not.