I think that's right, Knit Wit. That's why some people find classic era stories dated. It's no longer SHOCKING to learn somebody has been in prison, was once a prostitute, or uses...MARIJUANA! Accusations of extra-marital affairs don't carry the same dramatic weight they once did. Not saying it's meaningless in real life. But in a movie, it's "Yeah, well. Whatever..." Fans like us imagine ourselves in the time and place of the film's release. We see it, at least to the best of our ability, as it was seen at that time.
If this is completely crazy, call the paramedics. I'll have myself committed. You know when I think that innocence was lost? When the president was shot down right before the nation's eyes. After that, we began to ask questions that had rarely been verbalized before. Wars were not accepted at face value. Law and order was challenged. Drugs came into the foreground. And violence became more and more common. Today, as opposed to 1963, it's a surprise when we DON'T see something tragic on the evening news.
Is my theory logical? No. Technically, it makes no sense. But as Sally said to Harry, "You do the math." Society was one way before that day in Dallas. Soon after, it was something very different.