No, the point of a stable family is the relationships. Kids may be one of those relationships.

The point of reproduction is kids, and they can happen without a stable family as well... Quite often in fact. And they can be raised in different arrangements too, like wards of state and in kibbutzim, which is implemented right are not destructive. Or even by single parents (but that one is hard) or by surrogates who have a stable family.

Or by another kind of robot :)