What is your basis for such a statement?
I have a feeling that if you and I both asked him that question, he would say "what is that to you?" I just don't believe that arguing over the age of the earth is a tremendously important thing, and yes, I'm guilty as charged.
Jesus was, in fact, asked point blank what the important things are, and He answered obey the commandments and love thy neighbor. He didn't mention the age of the earth.