Modification is not confined to historic interpretations. The 1921 Census transcriptions on Find My Past have been riddled with errors in the case of my family research. Completely misunderstanding the hamlet of Lidsing, and labelling it within Gillingham, my great grandfather kept the Harrow pub, and his age is changed from 74 to 94.
I posted four corrections in one evening.
So yes, I agree Martin, easily changed.