Dave explains human nature:
The reason privacy and security can be so difficult for average Mac, iPhone, and iPad users is the same reason that using a complex password is difficult. Humans are like water and we tend to flow downhill. It’s natural to do what is easiest. Complex passwords are difficult to remember so that’s why password, and 123456, and qwerty, and abc123, and monkey are among the most common passwords and the worst to use.