Quite right. That's what having a monarchy is useful for. It can speak. So when the culture of an institution goes awry, they can help it correct its course in real time.
The BBC not only engaged in the original lie. It hid the lie for decades. That tells you the culture is deeply corrupt and arrogant, with loyalty to the organisation and not to the country.
This will cause major changes.
Whereas Harry's attacks have done nothing useful.