Because other countries adopted similar security protocols and still MH370 and Germanwings Flight 9525 happened. And the 2004 Russian bombings.
You do have a point insofar as that 9/11 changed the game: previously a hijacking just meant you'd get an unscheduled vacation and would likely be released unharmed. Now the assumption is that it's a suicide mission so passengers will fight back.
This is nothing to do with the TSA's security theatre; it's simply because most people don't want to die.
To think overwhise is "my magic rock keeps away heffalumps" levels of reasoning.
Because there have been zero heffalump attacks since 9/11.
What on earth are you talking about with MH370 and Germanwings 9525? Do you believe I'm claiming that the TSA prevents mentally unstable pilots from crashing passenger aircraft? In case that's actually what you understood me to be saying: no, that's not what I said.
> This is nothing to do with the TSA's security theatre; it's simply because most people don't want to die.
There are plenty of aspiring terrorists who are perfectly fine dying during their attacks... obviously...