Since copyright is first and foremost intended to be a mechanism to enrich the long-term public good, I'd argue that a rightsholder's short-sighted intent to control their work is outweighed by the public good done through archiving and preserving a work.

Copyright was never intended to give authors ironclad control over their works in perpetuity. It was intended to give a limited period of exclusivity, in return for the expectation that the work would always become public property. Eternal copyright upsets that balance, and shackles public culture behind bars.