Up to a point. Most of your argument I love, but The pipe organ was developed to make sounds, music of its own and particularly to accompany choirs, not emulate them. It wasn't really until the Victorian era that the orchestral organ was a thing, with stops deliberately created to emulate and even replace orchestra sounds (some fairly realistically, especially with the clarinet and flute families for obvious reasons). Pipe organs are excellent at both analogue simulation and their own sounds and performance! And, no two of them are the same, most remarkably.