He has proved his words countless times now. I have no idea what you are talking about. Only criticism I have about Elon would be his estimations on the time but I work in the tech field too and I can relate to issues coming up which postpone the deadlines.
How exactly is Waymo thought to be the leader? It's like the same argument short sellers have been making for years that Tesla electric cars will be overtaken by other car manufacturers. Come back to me when Waymo has overtaken Tesla in actual and on the market product.
I think history has demonstrated that betting against Musk is not a wise choice.