"are we useful to them?" interesting question! Did the earth invent humans so that wheat could proliferate? Or roses?

At risk of revealing just how crazy I am, though, I started your essay with the Llama nomenclature, and got a song stuck in my head. A crazy song. But it had me read the article... Llama lama, bo bama, lo lamma... Sorry, I know you didn't give it to me, but I am giving it back anyway... :)