The headline was confusing and reading the article doesn't really clear things up. I don't think Gill is imagining the same sort of "pretend person" that I would want out of AGI. What I want is a personal assistant that knows me extremely well, is able to tirelessly work on my behalf, and has a personality tailored to my needs and interests. It should be general enough to understand me on a personal level and do a good job anticipating what I want.
That would not at all be a waste of energy to me.