This is true. One see a child that is happy and it's looking very intelligent, but that doesn't mean that certain challenges won't prove too hard, and in time won't do harm.
Humans got subconscious processes, and children might appear very ok after a big trauma, but deep down they can still hurt badly. Why pushing them in further stressful situations, or situations that they would look at them differently in few years...?
In my opinion those children entered into public attention too soon - 2 weeks after their father death, at memorial. Maybe it helped in some way, however was way too soon. Then the Grammies... That was totally unnecessary and again too soon... Why put them to collect awards for their father? Now this interview, even if they would appear shortly, why should they help to their father legacy? They can do it so well when they will be adults.
Meanwhile that legacy can be enforced by a united voice of the family, by them not going to tabloids, by stopping various stories about Mike being as manipulated, druggie puppet and fake interventions. Or about Omar, or etc It would be easier to do that. Mike children won't be necessary then.
Prince, Paris, Blanket only duty is to grow beautifully and harmoniously, not to help in the image of their father. For this, stories from third parties are enough, stories that tells us how smart, educated, good kids they are.