It's fine if a pastor can sing well, and I think anyone who aspires to improve their musical skills should be applauded. But some fine, godly pastors are just plain terrible singers, and it is painful to hear them struggle. I also personally find that pastors chanting can sometimes be an actual distraction from worship, even if they are good singers. I wind up concentrating on how well or poorly he is singing, rather than on the words of the Collect or the Verba, for example. I also find it interesting that none of the NT lists of qualifications for an "elder" (pastor) mentions musical ability. And, yes, I actually prefer more "high" worship. Just my two cents.