This was not meant, that everybody should go to studio, and especially not about "clean sound".
I consider something like Hijokaidan "last recording album" one of the most damaging and extreme of their output. It's intense as fuck, raw as fuck, but different way. It doesn't rely on relative easiness of blown up tape levels, but simply capturing the sharpest and edgiest sound of instruments for ultimate noise.
We can see difference in Con-Dom output, where it is "just" him doing vocals over crude flanger throbbing, or something like Sermons 7", which are something that nobody else could or would do. Typically studio like approach on effects and unconventional sounds.
One could compare that when Sutcliffe Jugend did their early material on home taping, it was supreme level of violence. Already Death Mask which is studio work, hardly matches to sheer violence. Not to mention later works. They totally gained from home taping conditions, but sometimes it's the other way round.
I think this presence of "outsider" or unexpected situation, is something what can be seen on music in general. You can look into a lot of underground music, and at least in my own ears, the best era of each genre is when albums where recorded either spontaneously in studio which didn't understand completely what they were dealing with, or rough conditions on primitive gear. As soon as there was "established" metal studio, established grind/punk studios, and people who "knew how things should be made", it seemed like... well, they didn't. I'm great worshipper of self recorded material, but I do aknowledge some change in culture & sound, when everybody suddenly is the "producer" and "engineer". In same way as every guy with photoshop is "graphic designer". Some just benefit greatly when they allow a little kick or input from "outsider" so to say. Not that everybody should.