I think a lot of people confuse royalty and celebrity.
Because both seem rich and are gossiped about.
But the roles are very different. Not everyone rich and famous is a celebrity.
Some celebrities are rich and well known because of the particular talent they have.
Some use the celebrity angle to earn more money in another way not related to their talent.
Royals are not famous because of any talent they have and they are not allowed to make money from their fame.
Royals are rich because of the history of their role and the fact we continue to allow this role to have the status of wealth. (We could tax them to smithereens and vote for a Republic any time we like. )
M was not a celebrity before marrying H. She became well known because she became a royal. But she didn't understand why she couldn't use this renown, to make her own money.
The late Queen and Prince Charles tried to explain why you can't have a royal role and use the fame it gives you to cash in.
They didn't get i, and so traded the rich and famous but royal role with it's duty, expectations, boundaries and history for the rich and famous celebrity role where there are no limitations you can do whatever you want and monetise it.
Which is what this show is: look at me because I'm famous, now buy my stuff so I can be richer.
We don't get to ask anything from them it's now entirely transactional.
Whereas we can and do ask a lot from the royals.