The last time I checked, people were allowed to drink and drive. YES, Allowed! The sticking point is at what amount are you a danger to yourself and others? I have a different opinion of what that point is than you do. But your contention is that we should enact a police state type of monitoring (let's not kid ourselves - that's what it would take to stop all drunk driving) is as laughable as it is unworkable.
People are allowed to drink up to .08 BAC. That is a measurable impairment limit that has come about after years of study.
Let me frame this for you another way and see if your line holds.
Sucide bombers do not hurt all people. They do not kill all people. Not all of them even end up blowing up at all. Some make it to jail safely. This compares to DUI in this way. Both are choices made by individuals. Both have dire consequences when undertaken. These folks have a choice to make in their religion just like you do when you drink and then drive. If you should have that right why shouldn't they? Both choices harm people right? Indeed they do.
I supopse any action towards stoppinf suicide bombers is the formation of a police state too eh? Law enforcement and a police state do not have to go hand in hand. The best way forward is for people to stop trying to defend driving outside the established law. If you seek to change the law then by all means lay out for us all why a person should be allowed to drive at .10 .125 .15 or more.
Laws do not stop people from making poor choices. Laws only allow for the consequences of the choice. The best way forward is for people to show some personal responsibility and make a better choice. The choice not to drive when drinking. Yes it really is that simple.