The emotional dangers of disconnection can be seen on a long term scale. The more a person becomes detached the more they are likely to be alienated from any real emotional response to somethings.
For example: A wife makes an inappropriate comment about a colleague to her husband. A non-detached response could be an expression of him feeling that the comment was not called for. A detached response could be silence or even an un-opinionated acknowledgement of the comment.
Not having an emotional response to experiences can create an internal void that leaves a person feeling empty.