From Newsome - "Federal law, as implemented by the National Highway Traffic Safety Administration (NHTSA), already regulates vehicle safety standards, and adding California-specific requirements would create a patchwork of regulations that undermines this longstanding federal framework. NHTSA is also actively evaluating intelligent speed assistance systems, and imposing state-level mandates at this time risks disrupting these ongoing federal assessments."
Makes sense, everything else that CA does essentially causes things to cost more. This would be another thing. Not everyone has your salary. That said, I agree with you, cars going that fast are driven by idiot teenagers (or people that want to be a teen again) and are endangering people.