You seem to think that "the public" is one person with fixed opinions. In fact the public is a mass of people with diverse interests and ever changing opinions which can be manipulated and constantly is. So any gesture for Camilla may change the opinion of some members of the public and thus start a process towards the positive.
IMHO it is ridiculous that two elderly people who are in love and are married have to face so much negative media manipulations based on old clichés. Well, they were young once and the Waleses marriage was not all the time a cozy two-some but sometimes more than "a bit crowded" but give especially Camilla a rest. And an order to wear with pride!