I haven't said we should "dismiss all development of music to this point;" I intended to say the opposite. I've just seen far too many people on the Internet who bought a notation package and assume that if they imitate Beethoven closely enough (even if they don't have a clue how he worked), they will be regarded as geniuses.
I got my back up when I looked at the categories available to define my musical style and saw it was so limited. Too often people have told me they hate contemporary music because it is all dissonance--or some such nonsense.
I think you might agree that I have a genuine talent, but I am never going to be performed. There are so many people clamouring for attention, whether they can write or not, that they drown out the rest of us. So, I'll just stay in my little community, write whatever I fancy, and maybe toss some out there on the web from time to time in case anyone else enjoys it. That's not defeatism--it's reality.