I think it's a good point, although the, "who would drive the child" is always, for me, a problematic example. I mean, I got left home with kids long before I had my driver's license, and I know parents who don't drive. And while it's been a long time since I had more than one drink in a sitting, I've taken migraine remedies that leave me pretty unfit to drive. OTOH, I've never, when I was left solely alone with any child, including mine, taken anything that left me unable to respond to a crisis in a reasonable, thoughtful manner.