Ok, you got me. Understanding teen sex and drug addiction are indeed pointless. I'm sure all the sociologists, scientists, and psychologists who have made careers out of studying that sort of thing will be comforted to know that their life's work is pointless.

The hacker knows how to break into your computer, and therefore, how to fix the hole.
No. At worst, they may know a couple of different ways to exploit a system by hand. At best, they know how to run a suite of tools to find the vulnerabilities. And keep in mind that vulnerability testing and pen testing are two very different things. And what is the so called hacker going to do when he/she finds a vulnerability? Are they going to rewrite your OS or application for you, or are they going to tell you to patch your system? I'll vote for the latter. In the case of the former, the reason they don't have to depend on the tools is that they understand the OS.

Who would you rather have protect your house against burgaries, like in the show It takes a thief, an ex-theif, or someone who secures homes as a profession
That argument is not valid. You are implying that only two kinds of people know how to secure a house. I would contend that architects, engineers, insurance adjusters, and building inspectors know quite a lot about home security also.


i will prove my point when I have time.
Hope you have lots of time