Why should they BOND??
Yes family is important, but so are other relationships. THe RF DO problaby stay in touch more with "third cousins once removed" than most of us do, but that's because of the fact that (a) they have money to travel and visit more than most of us and (b) they do depend on "the family" as a support system, a bit more than most of us do. because they are royal ie in a unique postion and so their relatives have a better idea what their problems are, than other people outside the RF.
However, while I think they DO spend a bit more time togehter than Many Families they still have busy lives and they have other relationships as well. Charles is a very busy hyperactive man. he has a wife, his 2 sons and 2 grandchildren.. AND he also has a lot of work on, a large cirlcle of friends and time is limited.
its up to him, how much time he spends with the little ones and I think that while they are very lilttle, he is content to see them but not all the time. He will problaby spend more time with them as they get older...
I don't think he's the kind of granddad who is happy with the little tykes write with crayons on the wall, so he probably sees them, enjoys being with them and is content to go back to his own life when they go.
Anyway its his business.
I agree that I've never heard of Margo "Raising" Charles and Anne or even being esp close to them.
in that time, it wasn't uncommon if parents had to be away, for tours for the grandparents to step in, but there was always a couple of nannies around anyway. And nowadays, Will and Kate take the children with them on tours.