User blog comment:DYBAD/Character Sheet/@comment-26362471-20171115224527/@comment-4867780-20171121222259

Lawrence himself is quite serious about it, as he personally raises every single child born in the Legacy Heaven alongside each Silver Sister. I wouldn't say the original mothers are hands off either, as they do their best as well and spend a lot of time everyday with each of their own.

You're not wrong, you simply have uncompromising expectations (all or nothing), and consider anything less as unacceptable, while things can actually work out quite well in a different way.

Narratively speaking, the Legacy Heaven was originally created as a decentralized version of Selforge City (merging the ideas of Selforge City and the Inner Planes instead of separating them), which I had been wanting to try for a long time. And fact is, without population surplus there would simply be no one to inhabit it, as Selforge citizens would prefer to remain in their united world alongside their big family rather than scattering themselves over many others.

Truth be told, the Silver Sisters were effectively created as half-angel half-robot servants who only existed for the sake of Selforge citizens, kind of like the Hibiki Units in the Imoutoverse, but were gradually humanized in later updates and granted their own life in their own world. So here again, you weren't so much wrong as just not fully updated on their relatively recent narrative evolution.