I strongly endorse this proposal. I appreciate the need for living persons to have privacy. However, I think WikiTree has carried privacy concerns (and fear of liability under GDPR) to an absurd extreme when it insists that we must not breathe the names of the Queen of England or the living ex-presidents of the United States (and must keep their profiles Unlisted) -- ostensibly for fear that they would sue WikiTree for breach of privacy.
Just as living WikiTree members have private profiles (with varying degrees of privacy), well-known notables should continue to have private profiles, with editing privs limited to the project that agrees to manage the profile, plus other carefully vetted profile mangers.
And WikiTree can start slow on this. Start by relaxing the privacy on the profiles for the Queen of England, her royal consort, and the Prince of Wales; the living President and ex-Presidents of the United States and their living spouses; the Pope of Rome; the Prime Ministers of the UK, France, and Germany; and other exceptionally well-known individuals.
Beyond the people who are universally known, there are degrees of notability, and it probably does not make sense to relax privacy restrictions on most of those degrees of notability. Example: The Unlisted profiles of notables currently on my watchlist include some [independently notable] adult children of a now-deceased world-famous movie star (family members were added to help connect the star to the tree), spouses of those children, and other people that those spouses were or are married to. Almost all of these family members are accomplished professionals who are the subjects of individual Wikipedia articles (and therefore also Wikidata pages), but only a couple of them are people whose names I would recognize if it were not for their more famous relatives. WikiTree should retain Unlisted privacy on most of these people, at least until after gaining experience with this proposal.