Yes I agree with you this statement isn t the absolute truth It represents the general direction of metal it doesn t want to be exhaustive about all the metal world Personally I d never classify a genre being based on general tendencies which sounds like prejudices to me anyway as I said many times I have to do this because this article has to be encyclopedic I m a metallar I know the world of heavy metal and I agree with what you said I ll edit that section then Thank you for your suggestions and collaboration