Just because it was soundly discredited doesn't mean the average person knows it.
They're working on the rule, "Show it enough and it's true."
This is how many people end up in jail. I can't remember the exact name of it, but it is planting memories. Many people accused, and several convicted, of child abuse are found guilty with testimony from children who were improperly questioned. It is basically a matter of planting ideas or thoughts in the mind of someone under stress, and they implant it as fact.
Put a person suffering from depression, PTSD, or recovering from addiction in a setting where the counselor asks questions like "When did you stop beating your wife?", or "When did you realize it was wrong to sexually abuse your daughter?", and they will come to believe that they were a wife beater or pedophile.
Spin doctors take figures, twist them, and then use them in a way that serves their purpose. Sad thing is that most people are too lazy to check it out.