Tesla on 'autopilot' crashes into deputy's vehicle in Washington state

So the last time this happened Elon Musk quickly tweeted that autopilot was off and not even available in the car that crashed but later it was revealed that it did have some features like cruise control but did not have the full package, so he were technically stating the truth, kinda. I wonder how he will react this time.

I don't understand how this is a road legal system. To be safe you have to be ready to take over and react after the car have given up so you now have to react faster than if you were driving without it. IMO it should be either illegal OR Tesla should be on the hook for all crashes with it turned on since in reality they are driving.