Camilla would not have been famous if she had not been first Charles's mistress, then his wife.
Diana would not have been famous if she had not married Charles.
Kate would not have been famous if she had not been William's girlfriend then his wife.
Anne's two husbands would not have been famous if they had not married her.
In fact, the Royal Family as a family is famous for being the Royal family not for the talents or achievements of its individual members. They are, as a family, not bursting with either exceptional brains or talent.
I can think of only three members of that family who achieved their fame from their work and talents, and not just because of who fathered them or who they married.
Anthony Armstrong-Jones was a renowned photographer before he married Margaret. Of course he became more famous afterwards, but he was already known as a society photographer.
Mike Tindall would have been famous even if he had not married Zara. He was a successful sportsman.
Meghan Markle would have been famous even if she had not married Harry. She was a successful actress with her own well-regarded blog. No she was not an A last actress, and in any event that's not the only kind of actress that is successful.
She is definitely the only woman who came into that family with a measure of name recognition for achievements outside the family.
It's silly to pretend otherwise.