Politicians generally don't understand this. Average people don't understand this. But it's still true.
For example, before 9/11 the assumption was that hijackers would try to ransom the passengers for money, so it was better not to resist so they didn't hurt anybody. After 9/11, the assumption had to be that they were planning to crash the plane, at which point all the passengers resist and a hundred passengers can easily take on half a dozen hijackers and it's well worth the risk of one or two getting hurt in the process.
So by 9/12, another 9/11 was no longer possible. It was already solved. None of the government action that followed was actually necessary and the TSA is completely pointless.
I did not say to do nothing. I said it will probably take a holistic approach. Holistic means look at the issue as a whole rather than trying to attack one symptom. A holistic approach would likely implement plenty of small partial solutions.
On many occasions in the past, I’ve found that doing anything often works better than doing nothing, like the US usually advocates.
Turns out that there are no perfect solutions, but there are a lot of partial solutions that in aggregate add up to the mental health the rest of the developed world has.