In my previous question, I brought up a hypothetical society where children aren't raised at all by their biological parents. Instead, the children are taken care of by hospital staff for the first year of their life. Then, children ages 1-5 are taken care of by daycare staff. Finally, children from the ages of 6-18 spend most of their lives in a boarding school (with opportunities to go on outdoor trips and vacations). In this type of society, there is no home life or households in the standard sense, and family units aren't really a thing. Children are entirely taken care of by either the government or private institutions.
The reason for this type of society is simple. It decouples reproduction from childcare and romance. In more conventional societies, adults are expected to marry someone they love, procreate, and raise children in a household. A society's population growth is based around people being good lovers, good parents, and having high reproductive fitness. If a lot of people fail in one of those three categories, it causes major demographic issues.
With communal raising however, people don't need a life partner to raise children with, nor does a person need to spend a lot of time and money raising offspring. There are 4 main use cases for communal raising.
- Hyperproductivity. With communal raising, all adults can reproduce naturally or artificially however they want, and then completely focus their lives on working and relaxing.
- Eugenics. Normally, two people marry and procreate based on love (or inheritance in the case of royal marriages). With communal raising, those aren't a factor. Instead, people who are determined to have good genes (either physically or mentally or biologically) can reproduce a lot and beget high-quality children. Once artificial wombs are invented, women don't even need to bear children anymore. Any donated sperm can be matched with any donated egg and any desired child could be formed.
- Parentless Settlement. This is pretty speculative, but I had this idea of zygotes and babies being sent to a continent/planet that is undesirable to live in. The fetuses grow in an artificial womb and all of the children are raised by robots. This idea started out as a social experiment, but it seems like an efficient way to quickly populate a location where the locals don't known any better and have no preconceptions.
- Promiscuity. If neither biological parent has to take care of the child after it is born, men and women can engage in a lot of casual, unprotected sex without child-rearing consequences.
Overall, communal raising seems like it could be an effective way to maintain a nation; even though no real life nation does anything like it. My question is are there any hidden downsides or complications that would make the communal raising model infeasible?