His son is a full grown adult. Common knowledge should tell you that parents can't magically change kids, yet alone adults. Further more, while I certainly don't condone drunk driving....it's not exactly very uncommon and I've never seen a realistic scenario that a father retire "to help his family full time" to prevent his adult son from drinking and driving. That's an absurd suggestion.
It's funny because some people are saying maybe Andy should have been there more when his kids were younger. All the while, failing to ignore that some parents are always there and accesible, but the kids still grow up making mistakes and not leading perfect existencies. Being around doesn't ensure anything. And assuming Andy didn't spend enough time with his kids, is also short sighted. Maybe he was a bad parent. Maybe the mom let the kids get away with murder. Maybe they were perfect parents and the kids just grew into who they grew into. Who the fuck knows? Apparently, a bunch of people on the internet are able to dissect and conclude not only the problems in strangers lives, but also the solutions. Typical nonsense that we see nowadays, where a singular tweet, sound byte, or headline, somehow tells the whole story, and imperfect people riddled with their own mistakes, are able to discern the limited information and insight, into not only the cause of the problems, but also the solutions. Fucking fascinating.