i think it came down to as he stated that there are people teaching songs and they are setting up people for failure
I see what you are saying, but I seriously doubt that when they played the song on Sunday, people in the church were calling them failures.
The one thing people forget or don't seem to realize is we have 'Professionals' and we have everyone else (amateurs, hobbyist, ect..). The church is filled with everyone elses but they try to call themselves 'Pros'.
If you are you will (or should be) taking a certain path, while everyone else will take a different one.