I believe life, particularly intelligent life, gives the universe meaning.
That's exactly what I'm saying.
We're as about as meaningful as anything the Universe has brought into existence...
Exactly my point. If the planet dies tomorrow in a fiery explosion, the Universe will not be a bit different. Noone will notice and noone will care. I think that sending a plaque with (pathetic and preachy) pictures in orbit is arrogant and self centered. I don't even want to raise the question about space junk and how would "aliens" differentiate between debris and inspirational plaques.
Always draw your curves, then plot your reading.