I think it's unreasonable for anyone to have an opinion on this either way. It's a decision for W&K and the press should butt out and so should everyone else.
My granny was 96 when she died and my son was 9.5yo. He had had a loving relationship with his great granny who had kept all her marbles to the end and as a former nursery teacher, knew how to have fun with children even after she couldn't move much independently. My son came to the funeral and obviously it was a very sad time but it was right for him to be there and we felt he was old enough.
My siblings decided for their own children obviously, and one 8yo niece came too and she was mostly ok but was possibly a little too young. 7yo, 6yo and 5yo didn't come. A babe-in-arms who slept through the whole thing was there, but would have been removed if she woke.
What would be hideous would be if it would generally, if they were a private family, be appropriate for George to come to his GreatGranny's funeral, as it was for my son, but the amount of press focus and gossip about it made it impossible for him to do so.