I honestly believe that alot of Christians raised in solid homes do, because that is what they know, Sunday you go to church and sing the songs, listen and knod and go grab a bite to eat. Why? Because of habit. That is what our whole lives have been That is how my wife and myself were until our early 20s, and That is when we received our wake up call.
Now with that being said we did not go the same route as our families, my parents our very modern and charismatic, we our more traditional and landed at a ifb church, and have moved 6 hrs away since then and the first thing we did was look for a ifb church (we found a good one, and we are becoming members Sunday, Amen!).