I mean, Uber's financials are a total mess, and their valuation is 100% predicated on "winning" at autonomous driving, and Elon just said that everyone using LIDAR platforms are fighting a losing battle, and I personally believe him.
Plus he owns the lion's share of the electric car supply chain, so...
Also, Tesla is heavily all-in on computer vision - I would be hard pressed to name a single person alive who has a bigger conflict of interest than Elon Musk when it comes to giving advice on the feasibility of vision-based AD. Consider your sources...
The final computer vision product they're trying to build isn't something you can just bootstrap your way into. Or even will, because building fleets of self driving cars means less car owners and customers for your main business.