Was the safe landing of Southwest flight 1380 extraordinary or expected?
Based upon the damage done to the aircraft, the fact that it retained a functioning engine, and the location of the engine failure and divert, no there was not a real immediate danger of crashing.

To be fair this incident was an emergency which caused structural damage to the aircraft and breach of the cabin structure, resulting in the loss of life of a single passenger.  It was also a freak accident and I don’t see any evidence that the aircraft or engines used have some kind of inherentt design or engineering fault the prophesizes more failures or future risk.

It’s possible that we did dodge a bullet and that, by pure chance, the failure of the fan blade and where it was ejected from the fan casing could have resulted in far more damage to the aircraft and critical systems like flight controls, fuel, hydraulics, landing gear, major structural members, etc that COULD have resulted in the very realistic probability of a much more devastating accident when the aircraft either attempted to land or could not maintain level flight further.