When kinship in the nation goes, the family follows?

Cadel Evans won the Tour de France this year and has now announced that he and his wife are adopting a young child from Ethiopia. It's possible that this is because there are fertility issues and that his wife hasn't been able to fall pregnant. But that's not how they are presenting the decision. They are saying that they always wanted to adopt and that it's how they want to start their family:

"We always felt the strong wish to adopt, so we decided to start our family through adoption."

The explanation jumped out at me because I've read similar comments from Westerners recently - there are people who wish to follow the lead of Angelina Jolie and create a blended adopted/biological family.

And I suppose it's a logical progression for the liberal West. If ties of kinship are held to be meaningless in terms of our larger communal identity, then it's likely to follow that they will be held to be meaningless in our family identity as well.