Put another way, republishing an otherwise unavailable CC-licensed/open-source-licensed work is explicitly respecting the author's wishes, the author that published it under that license.
I doubt (but obviously don't know) Mark wanted to excise his work from human memory, he just didn't want the personal responsibility of maintaining those resources/participating in their development as a leader. That's the wish worth respecting.
Mark has produced some exceptional reference works and released them under an open license. They certainly ought not be removed from existence on anyone's personal whim, original author or not, no matter how much we sympathize with his situation, whatever that might be.