We never invest effort in things that provide the most value; we invest in what we're the most emotional about. The number of people killed in 9/11 and every plane hijacking is dwarfed by any single year of deaths due to either vehicle accidents or gun shootings. But we do nothing about either of those things, and instead spend $180B on TSA, to save zero lives. We then roll back things like vaccine mandates, to kill more people (mostly kids).