People relate to other people more readily than to ideas. That’s why one of the most powerful sales tools available to marketers is the “real-life” example. I tossed those cute little quote marks around ral-life, because the truth is that most of those examples are fictionalized.
Now, just because they’re fiction doesn’t mean they don’t reflect the truth. The key is to take a common experience that represents many people, and turn it into a believable (but fictional) character. It’s not illegal or unethical, as long as everyone understands that it’s just an example to explain a concept.