

It isn’t wholely the point. It’s also a massive jobs programs.
But specifically for not knowing what to expect is a feature not a bug.
If you don’t know the exact procedure every time - then you can’t plan for every countermeasure. You cannot plan 100% when the variables are always changing.
It also distracts any would-be bomber because they need to waste attention on following whatever rules they decided apply today only.
Bruv, the United States government could get any information they wanted if it was stored on US Soil since the dawn of the US. The only thing stopping them was effort.