[stefco_]

While that's true for most use cases, I think the author's point is that an archival compression format should be as forgiving as possible to the person recovering data because they are not necessarily the person who stored it. There will certainly be plenty of data in the future that was haphazardly stored but which needs to be recovered, possibly centuries after it was originally created, when no other copies may exist. So we should try to be nice to future archivists/librarians by making our data formats as robust as possible (in addition to our storage media, which is what you are correctly implying we should also worry about).