I do value self expression, that’s why I play multiple instruments, paint, draw, sculpt. I don’t really see how prompting a machine to make music for you is self expression, even if it’s to your exact specifications.

The "self" part clearly implies that someone else's self expression is under no obligation to be the same as your self expression.

You use instruments? Who would want to hear the voice of some mechanism when we have perfectly fine ones in our chests?