That is their prerogative. But it is an opportunity to see and learn from the possible mistakes that they made in a way they will never have a chance to again. Its also a chance to see what those people thought of them or how the felt they needed to act to win. I would want to know if my friends were talking badly about me or using me to further their own goals, even if it was in that context. I wouldn't want to be ignorant of it. And if that ruins the experience, then that's another thing they know about themselves and may need to work on.
Maybe Tully watching some of what she had done in the house would help her learn and grow and not do the same thing in the future. Maybe if Jade saw the way she acted around Ed, she would learn something and behave differently the next time. There is nothing wrong with making mistakes, but to not try and learn from them makes you an idiot. Here they have a chance they will never have again to literally look at themselves and what they were doing. It might hurt, but it could help them in the long term. You can't avoid something that might help you just because it might hurt.
At this point their chance for reflection has probably passed them bye. But those were characters that they chose to adopt in order to win. By acting that way it tells you something. Everything that happened in that house tells you something about that person. Even if a HM is acting a way they don't normally, their acting that way tells you about them. I don't get this "they weren't being their normal self" argument. They may not have been but by behaving that way that tells you something about them. It might be something bad or it might not.
