Regulatory capture means it wont be high and the potential profits to be realized from first mover advantage here means there will be a significant incentive to "move fast and break things".
So to speak.
I'd feel safe if an executive who OKs a software update that kills someone risks significant jail time. If that means no self driving cars for 20 more years then I am totally fine with that. That would simply mean that they werent safer as promised.