Gravemind

So my friend Rob just finished Halo 2 on PC, on XP... Yeah, I'm pretty good at cool stuff like that, google search for the 1911 repack.
Anyway, We were discussing the finer points of the game, and constantly the topic of the Gravemind's Poetry started popping up.

Example:
Silence fills the empty grave now that I have gone,
But my mind is not at rest, for questions linger on.
I will ask and you will answer.
Moar Example:
"This one is machine and nerve, and has its mind concluded. This one is but flesh and faith, and is the more deluded."
There is much talk, and I have listened, through rock and metal and time. Now I shall talk, and you shall listen.."
"If you will not hear the truth, then I will show it to you. There is still time to stop the key from turning, but first it must be found. You will search one likely spot... and you will search another. Fate had us meet as foes, but this ring will make us brothers."

Why should this terrible voice of bad poetry (Think Vogons) Be the central Consciousness of the most powerful race in the universe?