People are fascinated by evil because it's mysterious and it doesn't seem to have a rationale behind it, and the second you say that Hannibal Lector was abducted as a child and he had to eat his sister or something like that, it becomes immediately mundane. The character becomes mundane.
There is a great deal of advertising that is much better than the product. When that happens, all that the good advertising will do is put you out of business faster.