I am a step-father of a wonderful 11-year-old girl, whom I love if she were my biological own. According to this author, my wife (biological mother) and I cannot raise this girl as well as if her biological parents had stayed together, even unhappily so?
Please remember the difference between statistical analysis and individual situations. This is not about your specific situation, but is rather an analysis of similar situations across the board.
Adapting to the step-parent relationship is something every stepchild must do, and some have a better such relationship than others.
As the father of an adopted fourth child, I understand that the statistics might say she will have a harder time than our other three children, but I can work that much harder to ensure that she has the best possible outcome.
Statistics don’t deal with discrete outcomes. Statistics simply suggest the probability of an outcome. Because a small number of people win the powerball doesn’t change the fact that the probabilities are stacked against any individual ticket so don’t take it personally.