It's obvious. Most drunk people can get home without someone having to grab the wheel and help them. A few do require that, and they often get stopped by police.
Since almost any ai system currently needs SOME help on a 100 mile drive, yet most slightly drunk people would complete that drive just fine, you could argue close to that.
Except, IMHO, at the moment, autonomous cars drive at best as a drunk, and much worse on average.