You seem to think that music begins and ends with tones. I find that to be a reductionist and immature view of the matter. It's kind of like saying that it doesn't matter if it's Michelangelo or your 2 year old son that draws a lady. They're both ladies, it doesn't matter if one is painted with nuance and depth, while the other is a stick figure. Why don't you go and listen to MIDI arrangements of classical music, if you think timbre is so unimportant? You're sounding like a 16 year old that just learned about musical theory. You want the world to be simple, but it is not.
Innovation in timbre sounds oxymoronic to me. That doesn't mean timbre is unimportant or irrelevant to the music, it means claiming music is "breaking new ground" because of its timbre is laughable. There's no logic to it. There's no such thing as an objectively superior or inferior timbre. No such thing as a more complicated timbre. No such thing as an innovative timbre. Just different timbres and people's subjective opinions of them. Because you like electronic does not make it more innovative or cutting edge.