You seem to think it odd the Frei family continued with the adoption. I attempted to find some stats on how many adoptions have no signed consent from the father. I didn't find anything quickly, but I did find one adoption site that gave some interesting facts.
This agency is national, and while I didn't see a specific religious group named, I inferred it was there at least partially to offer an alternative to abortion. This agency, which works nationwide, stated it receives 25 calls a week from mothers who don't know who the father is, where the father is, or something similar.
We may assume at least some of these are being untruthful. Still that would be 100 a month, 1,200 a year that are seeking to offer a child for adoption. The numbers for all nationwide would seem to be extremely large. Do you think each adoptive family should say, "Okay, let's not adopt since we don't have permission from the father?" No, they go thru with the adoption and no judge calls them thieves (we hope).