What's the solace you offer for her family? "Hey sorry your daughter got killed, but maybe people won't be unjustly institutionalized in this hypothetical scenario I dreamed up where US civil rights suddenly regresses 60 years for no reason"?
Sorry, I don't find that very compelling. I'm pretty sure we can regulate institutions better, knowing what mistakes were made in the past.
People are human, they make mistakes. Sometimes they're wrong or even malicious. Yes, some people might be harmed in institutions. But, people are also being harmed right now. There's no scenario in which there is zero harm. You try to reduce harm as much you can and evaluate and adjust along the way. That's how you make progress. If you paralyze society by demanding perfect solutions, the result is stagnation and death.