What is "unneccessary" about death metal? Fine if you don't like it any more, but I don't think there is anything wrong with listening to it. I can listen to mu

What is "unneccessary" about death metal? Fine if you don't like it any more, but I don't think there is anything wrong with listening to it. I can listen to music like that as background music, to get pumped up, and sometimes even when I'm trying to sleep. But then again, I'm not the kind of person who adjusts my playlists according to my mood (sad, energized, happy, melancholic, ...).