It's even likely there will be legislation forcing LIDAR for self driving cars. Elon cannot flip the switch on self driving until they have millions of intervention free miles under their belt. Right now Tesla gets ~500 miles without intervention. One kid gets decked and the law will shutter his plan.
There is another layer too, where because of his polarizing personality, a lot of critical talent is inaccessible to him. Keep in mind Elon is doing -none- of the engineering besides the social engineering. He relies on talented people who want to work for him. I know many talented people who could make a difference for Tesla, but none who would ever give Elon a single minute of time.