I have no sympathy for drunk drivers, because I've taken care of too many of their victims. Often the drunk one is fine and it's the others who suffer.
One night we had a guy and his daughter in adjoining operating rooms, reported to be victims of DUI. I was taking care of the father, and we managed (just barely, and I mean pushing incredibly high doses of lifesaving drugs) to keep him alive long enough to get to the ICU for his family to see him alive one last time. You see, we didn't want both the father and daughter to die in the operating room. That was a very bad night.
Getting old and not knowing you are impaired is one thing. Drinking and then getting behind the wheel is a conscious decision. I'm not saying that other drivers aren't sometimes impaired by age/illness/cell phones/etc. What I am saying is that drinking and driving is a willful, negligent act that can result in tragedy. Just because someone says they can drive fine while intoxicated doesn't make it true. Others will say they have practiced enough to be able drive fine with alcohol on board. This stuff affects decision making, reaction time, and coordination - you can't fight biochemistry with bravado by claiming you're immune to the effects.
That argument will hold ZERO water with me, since I chemically intoxicate people every day and am intimately familiar with the effects. Some of our drugs act on the brain almost identically to alcohol.