There are certainly digital archivists at many institutions/organizations that are digitizing archives and things. The problem comes in from the fact that for most of human history things have not been digital, so there is only a very limited set of data that people can really "hoard." The problem is getting things digitized in the first place, and then not having the results just stuck behind yet another paywall.

In many cases what is already digitized, much like what is shown at museums, is just the tip of the iceberg of information kept in non-digital forms.