This is due mostly to the publicity that often surrounds blackouts, hackers, and viruses that cripple operating systems and destroy critical databases. They may make errors, bring in viruses from personal software they install on your city or county PCs, manipulate data, and commit fraud. They may change or destroy data, or they may steal money. Even if we believe that computer security really is important, most of us rely on the technical people to take care of it. We assume that our computer staff or the companies we bought the hardware and software from have solved the security problems.
Computers are simply tools that ordinary people use, usually honestly, but sometimes dishonestly.
After all, computers do not commit the crimes people do. Computers do not ignore or circumvent security measures people do. And even if everyone was honest and conscientious, people would still make errors as they worked on their computers. Also, some of the most effective computer security techniques can be used by even those who know very little about computers. Unfortunately, these are also the techniques that are usually ignored, like backing up files regularly and properly controlling passwords.