Thanks for your answers, Robynne and Eowyn!!
I presumed that the referenced profile would be quite busy, and possibly backlogged, after checking its watchlist (14,000+). I had a couple of recent requests that I deleted because they hadn't been processed after more than a month and I didn't know if the UPM process was appropriate for an admin-managed profile.
Also, I have previously sent TL requests that resulted in the profiles' being deleted - despite my having noted that I had documentation for the individuals. Most of the profiles to which I may be requesting access are from old GEDCOMs that I have been working; I would rather we keep the original profiles than have to create new ones.
I generally lock any lockable profiles, so privacy is not an issue (in my opinion, of course!). I mainly like to keep the original family unit intact, as well as the original Changes log.