So somehow Tesla figured out FSD, one of the hardest AI problems ever and it was actually simple all along, but he can't tell us?" LOL. I can't believe anyone falls for that. But if Tesla has indeed solved FSD, then it should be easy to show us.
My guess is maybe the Tesla FSD team made some of kind of AI breakthrough and Elon thinks that means they have figured out all of FSD. Maybe Tesla did build an end-to-end AI in simulation and since Elon believes E2E is the right path, he is concluding that Tesla has figured out FSD. But it is unlikely that Tesla has actually figured out the whole thing.