Learning everything you can about anything can be advantageous at some point.
But to specifically answer your question, yes that would be one advantage. If Christianity (or any other religion, group etc) seeks to impose its beliefs in ways that affect my life, then it would be advantageous to me to understand where they are coming up with these "rules" and why. Then I can make an informed decision as to whether I am for or against.
Because you are satisfied with what you "know".
I have found that it's society that imposes itself on me, more than me on society. In general, I try to live a quiet and peaceful life with regard to my beliefs, but there are times when silence is not an option.