You've precisely described the reason I will not fly commercial anymore. All of this surveillance has a chilling effect. On citizens, on business, on international trade.

Flying privately requires none of this. Which is how you know they're not serious about security but about control of the masses.

Also, the thing you're ignoring, and perhaps why you fail to understand the problem, is you haven't bothered to ask what the false positive rate is. Would you enjoy being stopped and arrested by very cocksure police simply because a computer made a mistake and they refuse to believe that?