Earlier quoted context omitted.
How could the average user possibly verify any kind of modern technology? Programming VCRs is too hard for almost everybody, do you really expect these people to understand even the most basic explanation of how their privacy is protected?
You don't have to know how VCR works in every detail to use it and be sure it does what it should. You just look at the recording and see its quality. On the other hand, using some security product, you can't tell if it's secure or it's snake oil, even if source code is open.
With security software, the threat model is completely different.