`  What you've been told seems to be erroneous. See Category:Reggae rock songs for example, which features reggae rock songs by artists whose main genre is not reggae rock (eg The Clash). Also ``hlists`` are more readable than ``flatlists`` and exactly work the same way. So there's no reason to change one template for another one... Finally adding ``hard rock`` within buddling references is useless if the references are next to the sourced material.   `