Not having a go at you personally, but it's comments like this that remind me why pilots should stick to flying aeroplanes.
There are plenty of reasons why airports and aeroplanes are high-value targets for terrorists. Have a read of the linked article.
https://www.macleans.ca/news/world/w...so-frequently/
In a nutshell, a successful terrorist attack at an airport means that a nation cannot provide security for it's own international gateway; one of the most important prestige items for any nation. People will stop coming, causing economic damage far in excess of the (already considerable) damage caused by the attack.
Further, the increased security measures required divert police, military, and other security actors from their previous tasks. If the terrorists have active members in that country, those members may have more freedom of movement and to act, because the forces that may have prevented them from acting have now been diverted into protecting the airport. So you now need more police, military, etc.
There is an extra economic cost of that extra airport security; some or all of which becomes permanent. The extra security emplaced AFTER an attack will always be significant, due in no small part to restore public (worldwide) confidence that you're going to prevent another attack.
Have a read of the article.
DIVOSH!