“One assertion for another.”
The difference is that Musk has a multi-billion dollar company with massive technological research and development, and marketing research. Your (and my) opinion do not have that behind them, except I happen to agree with him.
“their implementation or otherwise is and will be forced by government”
Interesting observation. But this has to be one thing the federal government must do. How else do we have standardized roadways and traffic signs? Are you a radical libertarian like John Stossel who thinks traffic regulations are unnecessary?
The transition will probably begin with self-driving cars having a human as a backup driver and exclusively allowing these cars to travel on dedicated highway lanes similar to how HOV lanes work now. Then it will become desirable in order to save time. And eventually so many people will adopt, the majority will want to keep human drivers off the roads to save time and make the roads safer.