Ok, but say you are parent and want what's best for your future kid. It's better for your child that you be #34 partner of Bill Gates, than #1 partner of Joe Jobless. Now apply that realization to everyone.
Soon, only the wealthiest will be able to find partners.
One way would be to raise kids in commune, but even then a super rich commune will beat any other. They would have access to best medical care, the best trainers, the best pretty much everything.
Anyone with any self-worth is not going to want to be partner #34 of anyone. They're not going to get any time with that person. Someone who's just a gold-digger might be fine with that, but that's it.
The whole idea of polyamory is that you can have deep, committed relationships with multiple people, but since your time is limited, you can only practically have 2, maybe 3 partners like this.
The logic is pretty much the same. Just replace kids with selfish interest. It's still qualitatively better to be Warren Buffet's partner #42 than Joe Shmoe's #1.
