While many people on earth do not care for their parents,
some on earth purposely do not see their father, grand father, father in law who has left life but is about to leave this earth.

Science increases age.
These born humans are so myopic thinkers & are so egoistic that they forget that
a day will come when they are grand parents or parents.
What is their answer when children or grand children ask them : Did you see your father or grandfather or father in law when he was about to leave earth ?
Only they can tell you.

While we keep privacy, it will be known worldwide if they kill related persons or do accdident in such a way that they will think nobody will know the truth.

But we believe in police and the mental as well as physical science they use to know the truth. And they even can play smart life game by asking their neighbours or relatives or friends in legal or medical system to do it, thinking they are free. But world will know the truth one day (when they are alive or dead. At least their grandson or graddaugher will know it)

As of now, we think there are humans only on this planet and if we see them on another planet one day, we dont want this egoistic attitude transferred to them, not even robots.