@alex This is about as dumb a take as you can write.
Adopting is subpar, none of the inherent traits of your bloodline get passed on, and the pool shrinks. You're objectively making the species worse and less diverse from a biological standpoint, unless you're heavily ridden by congenital diseases.
Is adopting better for the kids than being raised in an orphanage? sure. But putting random kids over your own blood is the failure of a lifeform, in every concievable way.
This also ties in to your followup post. A neighbourhood is the extension of a family, a town the extension of a neighbourhood, and so on. There's no point of comparison between people born from the core of your community and people completely unrelated, with their own cullture already ingrained, unlike a newborn which is a blank slate with a strong link of mutual affection to its family. You clearly don't understand how families and parenthood work, I really hope you don't have any kids with that mindset, they'll have miserable lives.
Either that or you're being deliberately disingenuous in an attemt to discredit a group you don't like, which is scummy and a better fit for twitter than this network.