It’s a great way to showcase that these things are in use and will be in use in places with bad privacy laws (and by those that ignore such laws). Most people don’t want to think that this happens on a daily basis, it’s logical for them when you tell them, but they’re busy with their lives and they don’t actually see it being done with their own eyes.

Now tell them how this data is connected to your ticket and your face/video being analyzed after the fact, which is then sold off to become what is basically an quantification of you as a person to judge you and determine what your addictions, views and flaws are, in order to expoit it to make you as miserable as possible. And people won’t really believe it since it’s uncomfortable to believe in. Showing someone’s face makes it more believable and difficult to ignore.