The difference though is that none of the other members of the RF have regularly publicly commented or criticised other members of the family in recent years. So they’re silent on this, which is consistent with their approach to be silent on all personal matters.
Harry and Meghan have made a career giving their opinions on other members of the royal family, and been liberal with their criticism. But silent on this issue.
that’s why it’s notable. If they’d not been so vocal on other family members, and if they’d not made comments about how silence is compliance, then their lack of comment on this wouldn’t draw any comment.