I think the deceased and their family would disagree.

Sure there are existing regulations, but the idea is that as this new technology evolves and is being tested in the field we will find failures and create new regulations to govern.

Consider when the horseless carriage began replacing horse and buggy, traffic laws evolved over time as we realized we needed lanes, traffic signals, speed limits, etc...

Those laws continue to evolve to this day (ex.: red light cameras, ride-for-hire, etc...), to suggest new laws are not required for driver less vehicles and the current laws are sufficient, especially where we have driver-less vehicle death, suggests a serious disconnect with how law works.