In the majority of things, the sufferings of few tend to be overlooked.
If a galaxy is saved at the price of a few memories, not many will know of it.
Thousands more shall be affected by it. Small worlds grounded in reality will scoff at the claims from twenty-six planets; the claims that tell of them being abducted out of the sky and saved only by a mysterious man in a small blue box.
No one is to say that irony does not exist: These worlds will ultimately be the ones most affected by the Daleks' final actions.
Perhaps it will be a thousand years prior to when that happened; perhaps a thousand later, that disaster will strike there.
The natives will be desperate, so desperate that they will contact their shamans and soothsayers; the ones that would once have been persecuted as witches.
And the oracles? They shall offer no hope. They will say that their prophecies have changed, that they can no longer see a strange man and his flame haired companion coming. They say that they no longer can tell of a small blue box, and of a puzzle, of which she will find the final piece.
They will say that something far beyond their control has happened, and that no help shall arrive mere seconds before disaster.
At night, mothers shall weep and babies will cry. Men will watch on, offering no comfort. They do not believe in false hopes.
And then, at one point in the vast sea of Time- night or day, it makes little difference- that planet's End of Days comes. People face destiny head on, for was not this predicted? Was this not meant to happen?
(No, it was not. Time is forever unpredictable, and destiny is only set for some: While it may seem like many, to the view of the Universes, it is few.)
Somewhere, worlds will suffer because Donna Noble wasn't there to save them.
But what is the price of some planets when all could have been ended?