In the classical liberal arts scheme, music is associated with Mars, as it is an art of command, a technique of infusing reactions, impulses and desires without passing through the filter of intelligence. That is why there are songs for different circumstances. You will not play Gregorian chant for soldiers in battle or military marches for monks focused on prayer. Rock and heavy metal were made to excite crowds, if possible even hysteria, infusing them with a kind of apocalyptic fear and an impulse to plunge into chaos. I cannot say that, with this, they have no social use.
In all of us there is something metalheading for the simple fact that we live in a time when no one escapes to participate, in any way, in the apocalyptic feeling that is in the air.
The greatest proof that heavy metal has some deafening potential is the displaced and absurd analogies that, at the slightest provocation, its cultists fire in defense of it, as if touching this point would activate some psychotic nucleus hidden in their brains. I can repeat the distinction between matter and form a thousand times, and suddenly intelligent individuals, who would immediately understand it if applied to anything else, become unable to grasp it.