Agreed that success rates are irrelevant to this conversation and it's certainly not true that adoption is always better. I think that most people would agree that the relative stability of having permanent parents would be, on average, better than being in the awkward foster system for ages. The foster system is meant to be temporary until a child can be placed in a permanent home [1] but 29% of children placed in the foster care system are stuck for at least 3 years [2].