Maybe people are just on different life paths. They have to figure it out themselves. Something so glaringly obvious to you does not really enter into their mind set. Not at this time. And yeah, its frustrating while you are watching it. Its like post BD. It is all so senseless and destructive and most of all avoidable.
Quantum physics does not come naturally to me. I am not even interested in attempting to learn about it. I do know it exists though. Some people do not. Same thing with relationships. For some people they don't know what they don't know. Or they just don't have the capacity. They view relationships and partners as I did when I was 15.
We all mature and grow differently. We all have different capacities. Different levels of emotional intelligence.
Maybe just be a friend to your sister for now. Accept her for who she is at this time. I think that's all you can do.
