It's likely grandparents and extended family have been involved in child rearing for most of history in communities, but doing this remotely hasn't.

The end result is likely that they're not your kids in more than a biological and economic sense if you don't go to lengths to be involved in your childs life (more than) daily.

I don't think that is western chauvinism, but rather universal developmental psychology. It will be (for lack of a better word) interesting to see studies on this.