Calling an organ "an instrument" is like calling an entire orchestra "an instrument". You kind of hit the "what does instrument even mean" wall very, very hard: an organ this size is a control surface for 1000+ instruments.
This is extremely far-fetched. Would you call a piano a control surface for 88 instruments? No, you wouldn't. An individual pipe from a pipe organ is pretty useless on its own as it can only create one note, just like a piano string.
This is extremely far-fetched. Would you call a piano a control surface for 88 instruments? No, you wouldn't. An individual pipe from a pipe organ is pretty useless on its own as it can only create one note, just like a piano string.