If she was a whale or a seal the other side would be on the beaches to push her back in to save her life. Human beings are so unimportant nowadays that we must fight for any dignity.
The question again is why? I know it's hard but put yourself in the shoes of someone who supports what Greer decided? What is your motive? Where is your decency? You wouldn't do this to a hardened criminal. If you err with an innocent, and especially helpless person, you err on the side of life, don't you? Aren't we all better off with her sustaining life, despite her unfortunate state? Who are we to say she finds life miserable? She may derive some worthwhile sensory pleasures out of the most mundane things that you and I take for granted. We just don't know. So, why torture this poor woman to death in an unprecented act of cruelty, in my view?