The media Steve Jobs said that people don't know what they want until you show it to them. When it comes to plenty of products, I think that it has a lot to do with brand recognition, and advertisers themselves are shooting in the dark. When some product comes out with a successful ad, which really drives sales, they don't know why that happened. Did it make people happy, did it make them sad, was it funny, gripping, was it the music, or setting? There is tons of guess work involved. This is all I mean by the necessity of appeal. They have to figure out how to appeal to people's values, and dispositions. They can't just tell you to do things, believe things, and like things. I'm sure they wish they could. This is what generates advertising trends. Someone does something successful, and then everyone tries to copy it based on their perception about what it was precisely that made it successful. Attractive people tend to be a pretty big stable. So, it's, I think, a combination of product recognition, and presentation. People can't buy things if they don't know that they exist. So the first step is just getting it out there, so that people know about it, and the second is doing it in a way that appeals to them, and makes them pay attention to it, and want it.
I'm not convinced that only since the advent of local news have people thought that the world is more scary and dangerous than it is, and others are more frightening and dangerous than they are. Other people than the ones we know have always been weird demonic sub-humans that don't share our higher values, sophistication, or intellect. People want to see train wrecks, and not train building. That's why the former will be all over the news, and the latter will get a small blurb.
We are definitely all parrots of things we've read, and watched, but that isn't so much in my view that we've changed our values, as much as we think they formed our sentiments in a better, more persuasive way than we could, and they're authoritative. People's opinions definitely change, but no so much their values We can all be lied to, and believe things that aren't true, but appeals to strongly held values and opinions are a little different. It takes some world shattering sky-opening up revelations to change those.