Here’s a little perspective: FiveThirtyEight: The Odds of Airborne Terror
Over the past decade, according to BTS, there have been 99,320,309 commercial airline departures that either originated or landed within the United States. Dividing by six, we get one terrorist incident per 16,553,385 departures.
There is an underlying Maginot mentality to the way the TSA implements most security measures.
Numerically it makes sense to not worry about it so much. On the other hand, how good is the general population at statistics? I mean, people still buy lotto tickets in droves, especially when the chance of winning is the lowest.