I'm of the generation that were forced to write with the right even though I was a natural lefty. I also broke my left arm when I was 2, which may have made things even more messed up. These days I: * Write with my right, my left is not quite as quick/tidy as my right * Swing/grip with my left (cricket / golf / etc) * Use my phone with my left * Mouse with my right * Cut (scissors) with my right (but we don't have an…
I'm not sure why people have started to make reversed musical instruments. I saw a video with a reversed piano, calling it "left-handed." I am a left-handed person who plays the piano and I had always thought the keyboard was laid out like an ascending scale on paper rather than having something to do with handedness - low notes on the left and high notes on the right. The motions involved in playing music are so wei…
At the developed level where the composer doesn't give a damn about how easy it is for the musician to play, yes, both left and right-handers have to figure out how to realize the piece and would make use of their strengths to do so.
For instruments like guitar I think the case for reversing the handedness of the instrument is a bit stronger, since the hands serve very different roles there.