Where does it say that it is wrong?
Almost all of what goes on in a Church is man made. God gives guidelines in his word, but then leaves the rest to us. That is one of the differences between Christianity and the legalistic systems like Islam that tell you when to pray and where to point your head.
The most free people on the planet are Christians. We may each worship God in our own way, within pretty broad, in some respects, guidelines. The rest is useless arguing, which is unbecoming of those who say they are His..
Ephesians 5:19 Speaking to yourselves in psalms and hymns and spiritual songs,
singing and making melody in your heart to the Lord;
Colossians 3:16 Let the word of Christ dwell in you richly in all wisdom;
teaching and admonishing one another in psalms and hymns and spiritual songs,
singing with grace in your hearts to the Lord.
No "worship leaders" or performances there.