The comments here insinuating that airplane terrorism is a non-issue would make for a good chapter in Carl Sagan's Demon-Haunted World.
Yes, after 9/11 airports did introduce 'security theater' methods. That is a fair.
No, worrying about airplane terrorism is not pearl-clutching. The most likely explanation for its decline is that the changes the establishment made were effective.
The establishment successfully dealt with the difficult problem of airplane terrorism, thereby leaving the public free to take it for granted and complain about the establishment.
Are we to worry about train terrorism also? Shop terrorism? A person might bring a bomb to any crowded space, it simply is not practical to check all of them.