Most mainline Protestant churches are nothing more than social clubs where people throw around vaguely Christian language now and then to feel good about themselves and virtue signal. Some are even borderline agnostic are just places where normal people who are freaked out by hand waving and "fire and brimstone" preaching go to share their more private, reserved faiths in God and Jesus with each other ... they also occasionally use common sense to see some Biblical stories as allegory and don't care if the psychos down the street at the evangelical "church" think they're less Christian for this basic level of intelligence and non-cultish attitudes.
Always rich when these much newer evangelical religions trash Christian faiths that have been around for so much longer because they're not weird enough.
Jesus told us that we are the light of the world. Even if the average mainline church's attendants truly believed in God as more than simply a metaphysical concept, there is no point in lighting a lamp and putting it under a bowl, which is exactly what restricting your faith to the four walls of the church is. We have to shine our light at darkness, which is in the real world outside the church. It is a good thing to be overtly religious and project our beliefs into every facet of our lives.
