There are questions on this site about minimal sound in space. But I was very surprised by Russell Borogove's answer to "Why did the Saturn V stage faring appear to burn after separation?" that "hydrogen-oxygen exhaust is essentially clear".
Without visible and audible evidence...is spacecraft exhaust even observable in space? I suspect it still has an infrared heat signature or something. This paints a very different picture than most movie depictions of spacecraft maneuvering in space.