As is pointed out, if your assertion about the person being profiled [such as his birth / death / marriage(s) / land deed / tax roll / census (residence), burial site is a document sited at familysearch which contains documents issued by duly authorized authorities] it is obvious that a link to this document (scan or transcript or index) should responsibly be in Sources, and the link in operating order.
In short if I make an assertion about the person profiled, I need to cite where I found the information (its site) and once there, the viewer should be able to read the supporting document for themselves.
Never mind that URL are ephemeral. Neither I nor many others have the material resources to obtain a physical copy of the said document, nor do many of us have the mundane space in which to store that physical document.
IF Familysearch with its documents disappears from the www, how much longer before WT disappears from the www? Both sites are online and therefore "ephemeral".
I agree that simply stating the source site was "Familysearch database" without providing a hyperlink to the particular documents is "negligent" for a WT PM.
In science if you cannot recreate the experiment and obtain the same or similar results, then the original experiment is deemed "dubious". It is the same with a Profile, if the viewer cannot follow that paper trail and get the same or similar results, then the Profile is deemed "dubious"
ON THE OTHER HAND: I ran across a PM who wasn't even adding that much in the way of sources so I posted a note as to how perhaps the sources could be more developed and we corresponded -- he's 94 and in poor health and working from notes made by his father (who died when the PM was about 6 or 7) and the notes merely pointed out the source was the Library of Congress. It was all the correspondent could do to get all these profiles created. I suggested a maybe blanket source which would state his father's name (and dates) as author, that the work was edited by the correspondent's name (and dates), that the work was privately published, and that the original sources were located in the Library of Congress. Whether he'll use the blanket source AS his source, I don't know. He's doing what he can do in the time he has left with the physical and mental resources remaining to him.
As has been suggested, or will be suggested, perhaps communication with the current PM, if there is one, can be initiated. Otherwise, the solution may well be to start adding sources to the profile.