No, I think that would be classified as "bad law" because it wouldn't be enforceable in any meaningful manner, and you'd need to impose the same conditions on opposite-sex couples which I can see being very popular.
I think it's far more important that kids have a stable and loving environment to grow up in than having to have both biological parents present. My Dad lost his father at a very young age and was brought up by his mother and assorted extended family members - as you saying making the best of the situation.
My point being that rather than trying to hold to an ideal that most marriages fall short of as being the only acceptable way and providing no guidance for when it fails it's better to support something more realistic that still works very well.