Now is it, really?
When in distress, this is perhaps the least comforting explanation for what has occurred. A twist to saying that what happened indeed did happen, and not much can be done to reverse it. The vacuity of this statement comes from, not only the fact that it states the obvious, but also, the attempt to diminish the value of your apprehension, fretfulness over this something. The foremost issue is not to define the occurrence, but the consequences/solutions/problems of such an occurrence.
It is is undoubtedly what it is.