What is the point of putting a Rock on the comm with the Mantis?

A couple times now, I've encountered a Mantis ship decorated with Rock body parts. If I have a Rock crew member, I am given a blue option to put him on the comm with the mantis ship. Every time I do this, there is still a fight and I get no obvious rewards increase at the end.

Usually a blue option avoids a fight or gives some other kind of benefit, but what does this one do for me?

There doesn't appear to be one, except for the unique text that occurs. I've never had anything happen differently after choosing this option.

The FTL Wikia lists this event and the various outcomes, which lines up with what we've observed. However, they also note that this event is sometimes buggy and may be incomplete.