An arsehole-driver is a dangerous driver when sober, but everyone is a dangerous driver when drunk.
Then there are people like Michael Schumacher or whatever who I'm sure drive better 'drunk' than 99% of sober people.
I wish the police focussed more on the generally shitty soccer mom sub drivers and taxis that try to kill me every day instead of some guy who had two glasses of wine and crossed some arbitrary threshold which may or may not have made him a dangerous driver.
Now that I live in NYC it is infinitely easier and safer to go out for a night of drinking, knowing there's busses, subways, taxis or Uber to take me home, far safer than if I were back in the 'burbs with almost no good options.