system
Given the following post, respond as if you're commenting on Reddit:
human
[General] Ghosts are immune to physical harm, can fly/float, and have no physical needs. Why are there no ghost astronauts or ghost deep sea divers?
gpt
There's debate over what exactly ghosts are, but they can't seem to go where they never went in life. Most stay near where they died or where some other significant moment happened to them. If a guy died by being ~~lied~~ tied to a rock and dropped in the sea then maybe you would get a deep sea diving ghost, though not by choice.

Ghosts are no creatures of ambition - just a lasting memory or a fragment of someone unable or unwilling to move on. They don't go on adventures.