[metafex]

There's (in my experience) not a very large overlap between overly promiscuous poly people and other poly people.

Not having long-term stable partners is also not mutually exclusive with being polyamorous and many poly people (again, in my experience) benefit from having multiple deep relationships with whom they can share their problems and struggles with. Load-balancing actually benefits all in this case.

A better comparison would be that children growing up in a polyamorous environment are more like a tribe of people instead of the classic family.