That's a simplistic and reductive look at what's happening here. The speed with which they're improving is insane. How long before they can build themselves? The speed of improvement would assume only a few years. You're mocking it for failing a dance done by one of the best dancers in human history. It's like saying that AI can't compete with usain Bolt, Tom Hanks, Nolan Ryan, Tom Brady, George Patton, Leonardo devinci, etc. yeah it can't beat the best of the best yet, but it's not that far off.
That dancing robot is better than most people, even taking the fail. Robots beat runners on a recent marathon.