It’s easy to forget that planes getting hijacked was a thing before 9/11. They would make demands, get a plane to Cuba or whatever, and the plane would land. 9/11 was when they used a hijacked plane as a weapon and killed thousands; that’s why everything changed.
consider this maybe? on average yes, TSA has absolutely made things more unpleasant. But for some unknowable number of flights and fliers, TSA has dramatically increased the pleasantness of flying