Being a practicing Christian has nothing to do with church attendance.
You couldn't be more right. A big reason we read the Nicene and Apostles' Creed in church was originally to weed out heretics who believed otherwise and to separate Christians from Jews. The church was started to break away from Jews who didn't believe Jesus was the Messiah. Jesus himself never went to church. It's still nice to go to service if you get meaning out of it, but I can go on all day about these things. My degree is in philosophy and religion with a concentration in early Christian conflicts between Christians, pagans, and Romans.