If it was easy to live in a society without drunk driving, then it would be done. Saying that some people don't get a DUI conviction is tantamount tolerating the conditions our society is in.
There are many society wide problems, all with various trade offs and costs to ‘fix’. (I added quotes, because in most cases I suspect a real actual fix is impossible - merely moving things around into another category or changing how the underlying situation presents itself).
There are also many different individual choices one can make, with relative tradeoffs.
How would you rate illegal drug use/overdose deaths relative to DUIs for instance? What solutions (and related costs) do you think would be necessary to ‘solve’ the DUI problem? How about obesity? How about heart disease?