In my experience, the best way to get people who have only seen the consumer side is in the third person.

We tend to underestimate the influence advertising (and media, etc.) have on us, but are relatively objective in observing the effects of advertising on other people, society, and such. Being influenced by advertising reads as being duped to most people, and we resist this conclusion.

This is a little different to many subjects, where we tend to empathize more with examples that have us as the object.