Where does one draw the privacy line for public figures ?
Most people generally agree that the public has a "right to know" for example where the Queen or the President of the United States for that matter spend the holidays. At least that kind of information is normally publicly disclosed.
The Duke and Duchess of Sussex on the other hand don't rise to the same level as a Head of State , so I think it is by no means unreasonable that their holiday plans be kept private. The thing is , however, that they make such a fuss of withholding information from the press, whether it is Archie's place of birth or the identity of his godparents, or now their holiday plans, that the end result is getting even worse press coverage.
As some posters have said here before, that seems to be the "Hollywood celebrity" style of dealing with the press, while other senior royals in the UK or in other European countries take a much more relaxed and less confrontational approach.