Really depends on the context. Imho, the concept is based on the morals of our (real) world.
It makes sense for cultivation/isekai fantasy worlds to not have this kind of conditioning over the MCs.
You know, even in real life would you potentially risk your life for a stranger just because is the "right thing" to do? Without any further objective? I don't think so.
Expecting it is a naive way of thinking caused by our society facade of values.
In a world were violence and war is not only accepted but common place it's pretty normal to not help others.
Edit: Btw, I have kind of pessimistic view about our society. And yes, my reply was not a recommendation, although I would give a shot at Saileri's novels if you are searching about care and affection feelings.