I had a feeling that's Paul Washer's view, but wasn't sure until I stumble upon this video while looking for his connection to The Lausanne Movement (which I found none by the way, at least not yet).
When asked about Worship, he noted:
1. the book of Psalms as book of worship.
2. A worship leader must be a theologian. Our singing ought to be theological. Conform to scripture. Fear of God shown.
3. Many love to make young boy with a guitar and sings well to lead. Not realizing God killed two worship leaders in Leviticus.
4. Worship must be didactic. Colossians 3:16.
5. Not all but a lot of modern music follows not these principles. As they are only about feeling in disguise of worship. Celebration of flesh, excercise of emotions. Only feeling the presence of God during those high musical moments, which is not presence of God but emotion. In contrast to godly members of God in "boring" worship.
It is therefore not overstating when he said a worship leader must be even more holy than preachers.