"I see no reason why church services have to be standard. I'v..." — Charles M. Schulz quote meaning

I see no reason why church services have to be standard. I've discussed this with the man who used to be a pastor here at the Methodist Church in Sebastopol. I told him I saw no reason why, on a certain Sunday morning, if a minister has felt during the week the burden of a topic upon his heart and he knows that it is going to take more than the standard twenty minutes to discuss this thing, why he can't rise at the beginning of the service and say 'I have something of special importance this morning so let's sing just one song, and if you'll forgive me, I think I'm going to need about an hour to explain it to you.' I think the congregation would appreciate his candor and give him their attention. If, on the other hand, he does not feel that a definite message has been given him, why not admit it from the pulpit and say, 'This morning, I'm not going to try to make up something to fill the time. We'll sing a few extra hymns and go home!' Why do the services have to begin and end at the same time, and why does everything have to be so rigid?