The paper trail that can be made available and/or added as evidence or a factoid in a historical record. Maybe with enough accounts people will find a way to avoid a repeat in the future. Maybe/maybe not, but they definitely won't know to change anything if there is no record of it being an issue in the first place.

From the play Lion in Winter:

Geoffrey: My you chivalric fool... as if the way one fell down mattered.

Richard: When the fall is all there is, it matters.

Thank you for pointing me to that. Still, strong disagree it applies here, so I'll counter with a quote from the second part of a three piece opus, in a photoplay long ago and far away:

Do or do not. There is no try.