I think sooner or later it becomes crucial. Otherwise, we'll just waste our lives worshipping a religion, instead of God.
If Christ is just some religious dogma based on a story in a book, then it doesn't really matter, anyway. To find out if Christ is real, we have to put the stories and dogmas aside, and start looking for the truth they purport to present to us, in the circumstances of our own lives. Because in the end, that's the only place any of it matters.
Sitting around praying to religious idols, or running around spouting off religious dogmas at others, doesn't save anyone from anything. Except perhaps from living their own lives like the human beings that God created and intended them be. What good is a Christian that never leaves the church (because he drags it around on his backs everywhere he goes)?
If you aren't looking for and finding Christ in your life, then you may as well throw the books and the dogmas away. Because they aren't working for you.