The commonality is that the title or prefix was removed from grandchildren of the sovereign of whom there was never any intention of them carrying out duties or representing the country.
Agreed.
To compare this situation with Sweden's is apples to oranges. Princess Madeleine and her husband never represented the Royal House as Prince Joachim and Princess Alexandra ably did for almost 10 years. Prince Joachim and Princesss Marie still represent the Royal House which Princess Madeleine's husband does not. The children of Princess Madeleine and her brother are still Prince/Princess & Duke/Duchess of XXX. They also were under school age. I'm sure it was pre-arranged that all the parties involved give a statement at the same time, not a reaction to an announcement, which was a most wise decision.
They could have but it would be dishonest given it is not how they feel.
It seems that the Queen might not have spoken to her grandchildren herself about it at all before making this decision public. Imagine that your grandmother acts as Queen of Denmark and removes your title Prince of Denmark without any face to face discussion about it at all. I would imagine that might feel quite hurtful and like one is being cut off. Even though it is a title it is also a part of their name and identity. If someone took away or changed my name without telling or asking me I would be devastated.
Of course, she is the queen and can do as she pleases here but the freedom of exercising this power comes with the consequences of the affected parties feeling any which way about it. It could have been handled better.
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