Look at it from further away, and it's behavior based on fear that's become harmful. It's identical to people afraid of flying, driving, swimming, going out in public, etc. But those are seen as disorders, and how does society handle them? By pointing out they're harmful, and offering help.
How does society handle computer fear? By saying it's ok? But it's not, it's harmful. These are the people who are hit for phishing scams and identity theft. Millions upon millions of dollars of damage. That's worse than many other fears that people aggressively seek treatment for.
So, why don't people get help for their fears? That's more person-to-person, but at a super-broad view they're not fixing it because they're ignoring it; "they have better things to do". Sometimes that's true, for things they don't believe to be harmful (sometimes incorrectly, sometimes not), but most of the time it's because they're afraid of it. That's an extremely poor excuse for not fixing things that you know to be a problem, and in every other situation everybody acknowledges this. Difficulty != excuse.
To summarize: if a fear is harmful, get it fixed or you are implicitly accepting the consequences of your fear. Fear of flying means you don't fly. That means you'll never get a job that requires flying, and you'll put more miles on your car.