Every instrument within music represents a living creature. Every progression of notes represents the expression of some sort of feeling on the part of that creature. As these different creatures express their different feelings within a coherent interaction with one another, the listener gets a momentary wisdom which in effect is the ability to understand multiple different viewpoints simultaneously.
The thing is, virtually none of these instruments represent creatures that actually live in the real world. They represent magical creatures not of this world. They don't actually exist but to really enjoy the music you must pretend otherwise; you must act in an illogical way. You must be somewhat mystical and to the extent you can enjoy music you are a mystical person. When you like it so much you start writing your own, you're an especially mystical person. If you write a song repudiating mysticism, well that's kind of funny. Of course it's just art. I'd write a song myself screaming against god if I had the voice, even despite not actually really holding that opinion. But it's damm fine art.
It is funny these people who consider it only real music if synths haven't been used. An actual string vibrating is really only representing a mystical creature exactly the same as any synth vibration. It comes down to people complaining about seeing a zipper on a old Dr. Who monster. It comes down to a lack of imagination.
Anyway this mysticism within music is ultimately the same thing as believing in flying sky fairies and invisible pink unicorns. Although it's probably a lot less harmful than believing in any organized religion.