The data is really easy to get. I wish more people would avail themselves of it.
It's just a little funny you think California is unique in this regard. Pretty much all of the US is extremely underdeveloped when it comes to public transportation. Hillbillies in the boonies have to drive a lot too.
However, most of us understand that films etc are made up stories told for entertainment where if we based our expectations of people solely on that information we'd be grossly mistaken.
There are plenty of people that have their lives severely tilted if not turned upside down from a single DUI. There are also people of means that get off with a much less interruption to their day. I'm guessing it is the same on your side of the pond as well.
I do agree infras and density is a better option. But lack of infra doesn’t justify to drive drunk.