If airlines ignored every threat that was “probably not” a real threat, they’d ignore all of them. It’s better to inconvenience a few thousand passengers than it is to kill a few hundred.
But also, just because someone is making what could be perceived as a threat doesn’t mean it won’t escalate, which is why threats are taken seriously even if we don’t know whether something is guaranteed to go wrong. You don’t want a crazy person making bomb threats on a flight even if they don’t have a bomb, because they can inflict other issues while trapped in a metal tube at cruising altitude.
https://www.iata.org/en/iata-repository/pressroom/fact-sheet...
For example, there are many pieces of equipment that can be broken and they’ll still fly, because it’s not essential or there’s enough redundancy.
Child safety seats are not required even though they’d save lives, because the extra hassle and expense would cause some parents to drive instead, which is much more dangerous, leading to more overall deaths.
Normally the decisions are quite sensible. But the moment any “terrorism” enters the picture it all goes out the window.
Most security failures happen when people wait to take something seriously until it is “very clear” that something is wrong.
We have the luxury of hindsight while reading this article but listen to the tapes of any security failures and you’ll find it painfully obvious that the most common issue is that people don’t do anything until it’s too late.
