Recently, a writer said his church has two services. It's probable that many preachers would not want to prepare or deliver two sermons. We have retired preachers in most churches who would love to preach one service. The cost would be minimal, the benefits great. Some preachers jealously guard their control.
Churches have guest or supply preachers, and control is maintained.
Every preacher should rejoice that all of God's people are being fed. All should rejoice that all are being fed. All songs are not created equal. Only a few achieve success, and only a few of those long-term popularity. Consider a song to be like a bird, with the wings being the music.