i actually really don't think that your "cool" emo/metal/hardcore/whatever band is any less stupid than anything you get from mass media. in a lot of cases, i think it's even more stupid. it's all designed for profit at the expense of expression or protest.
somebody that is really outside the culture will not create these kinds of distinctions, but rather reject them as illusory. what is the difference between taylor swift and evanescence? it's marketing. that's it, really. it's fundamentally the same product.
i'm less interested in what is mainstream or counter-cultural or rebellious or whatever else, and more interested in what is real and what isn't. unfortunately, for you, i may happen to be the one to burst your bubble and point out that the things you think are real are actually not.