“Going to church on Sunday does not make you a Christian any more than going into a garage makes you an automobile?” What is true about this message? How can this message he distorted?

Billy Sunday played baseball in the National League in the late 1800s.  He left baseball to become one of the most influential preachers in America.  Billy often made the point that “going to church on Sunday does not make you a Christian any more than going into a garage makes you an automobile?”  What is true about this message?  How can this message he distorted?