If a person only uses one finger and all the rest are kept frozen in place; the things that person can do will be very limited. That person will not live up to his/her possibilities.
If a church service only uses one person to preach and all the rest of the members are kept silently frozen in place; the things that church can do will be very limited. That church will not live up to its possibilities.
We have multiple fingers, because God wants us to use them all. They should not be allowed to atrophy.
Churches have multiple members, because God wants church meetings to use them all. They should not be allowed to atrophy.
The Bible puts it this way: “What then shall we say, brothers and sisters? When you come together, each of you (not just a preacher) has a hymn, or a word of instruction, a revelation, a tongue or an interpretation.” (1 Corinthians 14:26)
When a church begins to allow each member to share and speak in the meeting, they go beyond church and begin to experience the New Testament concept of ekklesia. More on ekklesia at this link.