Perhaps if Asiana 214 had an extra 10knots. This debacle would have passed unnoticed. The crew would have had retired to their beers in the hotel and the Intructor pilot would have gone on to pass his wisdom (or lack of it) to other pilots. The Capt under training would have checked out and may crash another day with worst consequences.
How many other incidents I can think off where 'what ifs' would have made it an 'uneventful, unnoticed flight'. eg: What if AF358 had another five hundred feet stopping distance in Toronto. It would have been another thathad got away with it.
Airport authorities should have approach exceedance alerts whereby crew are immediately grounded pending investigation should they attempt unstabilised final approaches pushing for a lucky outcome. With todays technology, this can be easily done.