Me and my friends had an argument at lunch today. I said they were a godsend. One said that pretty much all sub-genres are useless, and one said that genres in general are stupid. This being said, I don't understand genres. I don't know how a -core genre is different from the main. I don't know a lot, but I know that each genre is distinct.
He said Anything -core is just people making up genres to be different. He said that there isn't a huge difference between death metal, trash metal, black metal, etc. and it should all be metal. I begged to differ, that genres are very helpful, and they all are distinct from each other.
Your opinions on the argument?