In answer to your last sentence - not at all.
I expect a gay couple (male or female) to consider the needs of the child rather than their own desires. How they get a baby is irrelevant to me, it's the age that I have a problem with.
Consigning a child to never have the chance of a grandparent or for that child to not have grandparents for their children is cruel in my opinion
Just how do you know they haven't thought about the child's needs? And why will the child not have grandparents? What an odd thing to say! AFAIK Elton's mother is still alive, and perhaps David's parents are too. From what I've read Elton's childhood sounds pretty horrible, so I'm sure he'll be determined to make sure his children have one that's far better.