As an English major who makes his living as a writer, I've come to believe that we should view grammar as a tool to help us express ourselves, not as a rulebook that must be blindly followed without exception. Stephen Fry has an interesting take on the topic.
https://www.youtube.com/watch?v=J7E-aoXLZGY
https://www.youtube.com/watch?v=J7E-aoXLZGY