I'd disagree; black metal has a big focus on experimentation. There are a whole lot of experimental black metal bands.
Not to say that shoegazing is uncreative, but saying that black metal is generic isn't right.
You can shout it from the roof-tops, you'll be preaching to the choir.
And you better get started on this funeral pyre, and one day I will truly set myself on fire so you can see how dim my light is.
So you can see how dim is my life