I think a lot of you are missing the point a bit.

Yes, $100/month rent is insanely cheap. Yes, adults living with their parents really should try to save up to leave and can't really complain about the rules.

But I don't think that's the point. It's the way that the two siblings are treated so vastly different that would cause the pain. It's hurtful to watch how a family member has a clear favourite, as parents should be trying to not show who the favourite is.

That causes a lot of pain and is a huge topic on this website as it causes a lot of emotional anguish. It feels like a lot of you are dismissing that valid source of pain due to the reaction of "wow that rent is cheap!!"