Okay, but more realistically, restricting her social interaction. Pella didn't know anyone when her parents were taken away from her. She didn't have anyone she could go to for help, really. She even had to find the Night Nurse herself, since her parents had succeeded in keeping her "safe" enough when they were around not to need her. Everything else aside, if she'd had literally anyone else to turn to after her mother's death, she wouldn't have gotten so locked into the Punisher thing by the time she knew anybody. She may have even been able to get out -- or, at the very least, it would have occurred to her earlier than 25. 10 years is a really long time, man.
2. They taught her to survive, even if they didn't teach her to live. Pella is first and foremost a survivalist and has quite a greater sense of nuance than people tend to give her credit for.