Ok, hails to the OP for making the strangest drunk-post that makes complete sense. I think nearly every article on deathmetal.org points towards this ultimate question, and furthermore, how the Hessian can be defined away from the typical metalhead. Heavy Metal is easy to like, enjoy and even identify with; to take this one step further and allow the sound, lyric, image and all encompassing aesthetic aim one towards a transcendent existence, one of excellence, is a completely differrent case. Sure it's inclusive, and no, not everyone will get it - I think that can be relfected in the selectivity of quality outputs. It's an impersonal worldview, and therefore the social-benefits are never-present in it's genuine form; refer to the article about status in metal in that the largest chunks of the metal population abuse the culture for social gain.
What's quantifiable about the historic releases and individuals that seem to embody this ideal is that they last, whereas others do not, as they are just castes and imprints of what's leftover when something or someone meaniful has arisen. It (Metal and Hessiandom) lasts because it's strong, and the fans are comfortable with this strength.