Most people are called Lambs by Jesus. Recently heard that HALF of the people WANT to believe that everything their preachers says is TRUE.
A Church of Christ does not do WORSHIP in the series of not-commanded songs or sermons enabled by complex singing.
That is why you need to grasp in the words of Paul about the MANY selling themselves as teachers will automatically be FALSE teachers.
Paul DIALOGED until midnight: he did not and never did "make up" a sermon beyond what he had been taught. The ekklesia was open to asking questions and even challenging any personal opionion (doubtful disputations in Romans 14 included anything which came out of the imagination of the STUDENTS or ELDERS as the Christ ordained Pastor-Teacher. A pastor would never lead his sheep to feed by the "sounds of rushing waters" nor would he fabricate something and CALL it grass.
Complex music, in fact, conditions the rational (spiritual) mind so that when sermon time comes the audience is not able to rationally judge a statement. That's why most people cannot tell you much about the made-up sermons 30 minutes after bragging about the sermon.
People have to be CAREFULLY TAUGHT not to care what Scripture says. That's why people who have not been brain-damaged see the Bible as the grandest book every written and can still understand more than a five letter statement. Without the instrumental disabling most people can tell the difference between the good, bad and ugly and do not get a Phd and then tell you that the UGLY is their pattern.