Here's the standard view, that more people agree with:

Adopting kids is great. No problems. It works out just as well as having your own biological kids.

I don't agree with that. Of course it can work out very well, and I hope it does for most families.

But I've known two families that have adopted kids, as babies. Six kids total between the two families. And it hasn't been all bad, BUT there's were definitely some "bad eggs" in the families, that caused lots of trauma and pain.

Back in the 50's and 60's, if you adopted kids you may have gotten the children of "teenagers in love", who were just a bit more careless and headstrong than average. And there was still a stigma with illegitimate births, which caused the moms to give the babies up for adoption.

But now, there's almost zero stigma with having a baby when unmarried. And there's plenty of support for unwed mothers. So, if the baby is taken away from the mother, there's some very serious issues, from severe drug addiction alcoholism to severe neglect. And some of these issues are hereditary.

One of the babies adopted by one of these families has exhibited the exact same behavior, as a teen and young woman, as her birth mother. They both had multiple babies with different fathers while drug-addicted and homeless, and all the babies were taken away at birth. And the young woman was adopted into a family that I thought was great, they couldn't have been better parents.