[frogpelt]

I don't mean to nitpick but your hearing has strengths and your eyesight has strengths.

For instance, your eyesight is terrible at telling you a furniture truck is coming around the corner.

If you were good at separating the individual elements of music without much effort, perhaps music wouldn't be nearly as appealing. Who knows?

[sebkomianos]

Your example is wrong, I think: My eyesight can't tell me about the truck around the corner and I only know it when I hear it but that doesn't mean that I can see it next time. In comparison, when you "see" the polyphony you are one step closer to "hearing" it the next time.