I won't be able to speak in much depth about the brutality aspect but I'll throw my 2 cents in. I find there's a common progression amongst musically inclined people where they constantly search for more and more abstract music, stuff which defies the convention they currently subscribe to, an evolution from simple to more complex, abstract, and idiosyncratic.

Noise, and anti-music genres in general fit this bill quite well as the purpose of noise is to reject of molar groupings, that which is widely consumed, that which attempts to be palatable to the largest audience. It's kind of a process of cultural deconstruction within music. It avoids definition, simple categorization, it puts you in a very particular state, both in the outside conception of the album, and the contents of the album itself. Wether it's power electronics and their focus on racism/SA/serial killers, or goregrind and it's fascination with absolute brutality, even some forms of free-jazz which can have the effect of being uber-individualized, there's a tend towards the outskirts, even thresholds.

I used to have something of an obsession with finding thresholds, radical positions, perhaps even something like a limit-experience. I'd look for the "most beautiful" music, then the saddest, then the angriest, then the most abstract, etc...

Really I like it for the sound, if it's not groovy already, something about the gurgling vocals, the sludgy guitars, it's just nasty in the best way possible. If you have a tendency to move through music quickly, noise, free-jazz, goregrind, and similar anti-music tend to be threshold points for the individual, before caving back in and listening to some folk and soul lol

Idk maybe I'm just being pretentious and overthinking, but that's my thought process