It's only really possible to make a determination about whether it was hindsight or not after seeing the prominence of the recommendation. Suppose I tell someone a thousand times, "you should wear seatbelts," and once to fix their taillight. Then they are killed in an accident after being flung from a vehicle while not wearing a seatbelt. It would not be hindsight for me to say, "they probably should have worn a seatbelt." Maybe it would be if they were killed in a freak accident involving an unfixed taillight.

Unfortunately, given I have only second-hand knowledge of these reports' existence, and given they are probably not in my native tongue, I'm not really in a position to validate what the situation was vis a vis the generators. However, generators positioned on the coast, behind a low seawall, in a country that is regularly inundated by tsunamis, appears to be an entirely predictable failure mode. Not quite to the degree of not bringing a parachute on a skydive, but in that direction.