If your name is in papers... it’s a bad idea to go topless in public.
Except that it wasn’t in public. Even Royals have some expectation that there are limits to violations of their privacy. This is getting ridiculous.
Except that this was so clearly the opposite of being in public, and that the laws in the country they were in at the time are incredibly strict. It is a super-secluded estate, and the photog used a VERY, VERY long range lens to capture the image whereas to the naked eye they would not have been seen - especially without setting out to purposefully disrupt their privacy to capture a photo of this nature.