When you hear hoofbeats, think horses, not zebras. (Unless you’re in the Serengeti. Then, definitely think zebras.) An unusual presentation of a likely event is more probable, on balance, than an unlikely event.
The number of commercial flights that have been lost due to all causes is not terribly high (I am not sure if Wikipedia’s list includes all commercial crashes, or just a selection; other sites seem to be more thorough), but the number of those lost to deliberate action are in the minority.
