If an airline learned that a pilot was talking publicly about being “the Chosen One” or “the King of Israel” (or Scotland or whatever), the airline would be looking carefully into whether this person should be in the cockpit.
If a hospital had a senior surgeon behaving as Trump now does, other doctors and nurses would be talking with administrators and lawyers before giving that surgeon the scalpel again.
If a public company knew that a CEO was making costly strategic decisions on personal impulse or from personal vanity or slight, and was doing so more and more frequently, the board would be starting to act. (See: Uber, management history of.)
If a university, museum, or other public institution had a leader who routinely insulted large parts of its constituency—racial or religious minorities, immigrants or international allies, women—the board would be starting to act.
If the U.S. Navy knew that one of its commanders was routinely lying about important operational details, plus lashing out under criticism, plus talking in “Chosen One” terms, the Navy would not want that person in charge of, say, a nuclear-missile submarine. (See: The Queeg saga in The Caine Mutiny, which would make ideal late-summer reading or viewing for members of the White House staff.)