You're missing the other possibility: incompetent politicians writing bad polices to respond to the latest moral panic. Plane hijackings are pretty rare, yet we have TSA screening and no liquids over 100ml on flights.
The most hilarious though is in part 3 of Jojo's Bizarre Adventure. The main character is a minor so they censor his face any time he smokes. But in one episode there's a bad guy who can imitate people's faces, and he imitates the main character and smokes (without any censorship).
9-11 led to cockpits being secured. The rest was politically motivated, and does nothing to prevent a recurrence of 9-11.
Making me buy over priced water == Security theater that does nothing for safety
We do not need to be illogical about it, extreme government over reach should not be excused when a simple door lock was all that is needed
One of the reasons we have not seen another airplane based terror event, is not because of security, but because it simply would not invoke the response the terrorist desire. They want a nation to over react, to bomb things, to over all make the lives of the people they purport to be fighting for "freedom" on behalf of worse... This keeps them in power, and aids in recruitment.
Taking down a single plane does not do that, using that plane as a missile did, which door locks prevents.
Without wanting to sound too sarcastic, it’s possible there might be an implication going on there.