That one way is that passengers on a hijacked plane know that their survival is in their own hands....the "authorities" have no power to save them.
The only truly effective means of combating terror is to not let it guide your actions. If someone wants you dead, you will die. That's a grim truth. But allowing that grim truth to guide your actions is to surrender to terror and allow it to win.
Make no mistake, the TSA has only served to legitimize terrorism and victimize American citizens who are now being treated like common criminals merely because they want to travel.
If the TSA were disbanded tomorrow, do you honestly believe planes would start blowing up all across America? Of course they wouldn't. But we'd save a lot of money, and travelers would have their dignity back.