The storytelling aspects of the holographs of space jockey's / engineers running in panic seems well justified as far as the script is concerned.

I just cannot figure out why the ship would project those holographs in the first place. It seems like the only purpose could have been to serve as a warning, but then why would the ship want to warn anybody when it seems engineered to trap anyone that discovered it? Or is there another reason to play these holographs? Or was it just a malfunction?