No, Booze does not dimishish its capacity fo driving.
And that raises another interesting question. If a car have a simple switch taking it from driven to driverless, then what about the drunk who switches to driverless mode when he hear the horn of a policecar. How to prove which mode it was in when lousy driving was observed.
Actually ... they have been cleared to operate in at least a few jurisdictions.
I remember there was a recent news story about one involved in an accident - and the other driver was at fault. Which brought up MY question: In an accident involving an autonomous vehicle, how do you exchange insurance information?!?