Why should suffragettes who broke the law be pardoned?

I am proud of my great-aunt Kathleen Brown, who once hijacked a horse-drawn fire-engine in the suffragette cause and charged it down Tottenham Court Road clanging its bell. She did time in Holloway. She was also sent to prison in Newcastle for breaking a window in Pink Lane Post Office, and went on hunger strike. She was tiny and brave and I remember her for having hair so long she could sit on it. Would she have wanted to be pardoned by Jeremy Corbyn, as he now proposes? Surely the point of a pardon is to correct an individual injustice — because the person concerned did not commit the crime, for instance. It is not to apply a retrospective political view to what happened. When, in a free society, one breaks the law in order to change it, one is not absolved from punishment just because one acts out of conscience.