I have thought about these things for a long time, and arrived at the exact opposite conclusion: had such levels of security been there since the beginning of computing, there would be no jailbreaks, rooting, homebrew, or any real freedom. Everything would be so locked down and unbreakable that there would be no "possibility to disobey", and that is a far more terrifying alternative.

A world in which there is no crime is one where everyone has already been strongly coerced into submission and every aspect of their lives closely monitored and controlled. Ultimately, humans are imperfect and that's where all of these exploits and vulnerabilities come from. If we attempt to eradicate them, by essentially removing imperfection, we will literally be taking the humanity out of life. Is that really the (cyber-)world you want to live in, or move towards?

Whatever the cost it is worth paying.

I see this continuing insecurity as consolation that we still have some freedom left, but positions like yours --- increasingly popular, it seems --- are strongly reminiscent of the "war on terrorism" and its associated repugnance, because it is really the "war on cyberterrorism".

As the classic saying goes, "Those who give up freedom for security deserve neither."