Thrive AI Health is useless.Survive AIOpenAI CEO Sam Altman and Arianna Huffington — yes, the publishing mogul who started the Huffington Post during the mid-Bush administration — thought they could improve healthcare with AI. But so far, their joint venture Thrive AI Health seems more useless than reading WebMD when you have a headache. A demo of Thrive’s AI product, as uncovered by TechCrunch and which doesn’t seem like it was supposed to be live online, suggests that the company’s product will take the form of an interactive health-tracking tool. The Thrive…