Either you like it or you don't, really.
I don't inherently like any genre, so I couldn't explain why metal as a genre is good. I could only say "Here are metal bands I like, here's why.".
Love or hate metal, there's an ignorance about saying "It's just noise.". Unless you're used to it, obviously it's going to seem jarring. That argument only becomes true, in my opinion, with bands like Mortician. Tuning down to the point that it just becomes incomprehensible.
