Dismissing someone's problems as 'First world problems', or telling people they should not complain about something because not everyone can afford what they have.
And, as in this thread and others the dehumanising of people, just because they are wealthy or occupy positions of power.
The RF are human beings like us. They love their children and care for their family and when they find a black sheep in their midst their first instinct is to hope they grow out of it, or pretend to themselves it is not as bad as it looks and only in extremis eject them from the family.
When a family is also dealing with serious life-threatening illnesses among its members, this only makes dealing with a reprobate in the family more difficult. This applies, whether it is us, illegal immigrants or the RF.
Children cannot choose their parents and while some children can survive a dysfunctional upbringing and come through as balanced adults. More children, survive, but are damaged to a greater or lesser extent, and of course many will continue in the pattern they were brought up to.
Under the circumstances the two Princesses have turned out very well. It would be better they were not princesses, but that decision was made by their father not by them and they grew up with the titles.
I have tried to imagine what it is like in their situation, having parents they love yet, daily, seeing published in all the media their mother's utterly demeaning correspondance with a known paedophile, to know that your father has been committing, what are effectively acts of treason, while also being a sleazy sex obsessive.