It was about 5 years ago, I asked myself this question. A simple question, but no one could answer it for me.
Now I believe that with the help of socionics, I can answer it.
At first I thought it was to compare our values with others to be reassured that we are good people.
Now I think we talk because we want others to help us see the positive side of the perspectives that we value in the negative.
For example, if I complain about being tired while at work, I want people to help me take better care of my health.