I anticipate that I won't be able to cry when my parents die. I really hope I'm wrong. Reason is that I think they have great lives and are fulfilled so in my eyes it doesn't matter if they are 60 or 80y/o when they die. They have a good time on earth. It's helpful that I know about their childhoods and don't have any open questions because I've talked with them a lot about who they are. I don't think I'll be regretful when they die and have the wish to ask them something.
It sounds like tragedy is the cause for this rapid improvement in emotional processing. Maybe it's the only emotional state that can break down this wall of emotionlessness. Sounds painful, but I can understand how it could help.
What about when one of your parents die, and the other has to live alone for the rest of his/her live? Could you cry over the sadness of the one left behind?
I will cry as a response to their crying. This is natural.
I just don't need it. I would mostly cry to be empathetic.
I don't think this is wrong. Many people do it to help out e.g. that friend who cried on the funeral of your mother? He is crying to communicate his compassion, not because he feels grief. If you would know how many people do this, you would be astonished by the emotional coldness that many have inside their heads (involuntarily).
It sounds like tragedy is the cause for this rapid improvement in emotional processing. Maybe it's the only emotional state that can break down this wall of emotionlessness. Sounds painful, but I can understand how it could help.