Argue all you want. The expression “Preachers daughter” has been around forever. Every family on earth, from any religion, or profession or level of education can potentially experience a “black sheep” child that goes off the rails, in spite of seemingly solid parenting. To deny the possibility is an act of irrational stubbornness.
Doesn’t mean it’s a fait accompli, but it can happen to the best of us. The kid making dumb decisions holds the responsibility, unless they are developmentally damaged.
But not every family does. Sarah's family, unfortunately, seems to have some issues, more than the average family.