Dairyground
Noted. In my job long ago as a croupier, I was taught that each roll of the dice is independent of all others. Without drifting into chaos theory, or Quanta, the odds on rolling a seven are six in thirty six. I once saw eleven straight passes at the table, the "odds" are very long. Would you place a wager on such a thing. For a pax, the odds are almost nil that a rollback will occur. A frequent pax not so nil. Pilots less so, the Carrier has the most exposure of all, except the Authority has all of it.
AF
Please note I said NOT to rely on statistics. And include the Flip of your assertion to wit: It may happen more often than one in 100,000. That it happened once is startling (look at the length of this thread), twice is astonishing, absent your "Common Cause".
No less an authority than NTSB claims a recurrence is "likely". Read the report..... Less Faeries on a pin, more on the conclusion of the lab coats.