Currently, AI is not advanced enough, I agree. But it could be eventually. The thing is, it doesn’t even need to be mad at us for us to go extinct. It’s enough if it has different goals and human survival is not a priority of the AI. And goal alignment is a surprisingly difficult task from what it seems like.
Under the “Can I give feedback?” section, he mentions that he only used the simulator in Xcode for developing this. So sadly he wasn’t one of the few people with a development unit. That makes how quickly he’s done this even more impressive!