Very true, Chris, in those cases.
My main point and question, tho, is about auction houses and dealers that send posters out themselves to be backed and restored. Most times, we see some vague line that reads something like: "Prior to backing the poster had XXX problems", (often outlined in great detail), then continues: "It was worked on by a well known or talented restorer who addressed the issues and it now displays wonderfully." (paraphrasing here, of course).
The person who did the work is known, yet unnamed. That, at least to me, shouldn't be a secret, but the name indicated, just as all the pre- and post-restore issues were mentioned.