This is the standard argument of nanny-staters who wish to bargain away our rights in exchange for a little perceived safety. Next, I expect you to come back with "If just one live can be saved, then these new laws will be well worth it..."
People like you will simply not be happy until we live in a police state where everybody is subject to roadblocks and search & seizure at any time.
Bottom line, the elites fear drunks. Many drunks are worthy of this fear. They shouldn't be on the roads. But we aren't talking about drunkenness here, we are talking about small consumption of legal alcoholic beverages before driving.
If they were truly wanting to stop drinking and driving, all bars should be closed immediately. Hyperbole of course, but it shows you the hypocrisy of our ruling fanatics. Let them get drunk and kill Mary Jo Kopechne or crash into the Capitol and it's no big deal. Let us drink four beers when we weigh two hundred pounds and the DUI special unit gets involved.