Changing gates, changing flight times, longer than expected security lines, flight cancellations.

All fairly regular occurrences in an airport that travelers have no control over but must adapt to.

Earthquakes are much more rare, so not worth constantly worrying about.

... security policies changing (shoes on or off?), repeated "ATTENTION, BY IMMEDIATE ORDER OF THE TSA" announcements, people doing dumb things, people being rude, baggage getting lost, flights being overbooked...

There's a lot.

Most of the time it works out, but that was the point of the observation: most can still be pretty stressful.

> baggage getting lost

One way to make the airlines care more about your luggage and make it highly unlikely for them to lose it is to check a firearm as described in Deviant Ollam's famous talk on the subject: https://www.youtube.com/watch?v=KfqtYfaILHw