There is a lot of debate and misinformation on this subject. My understanding is this is primarily an aging or elderly issue. For the majority of people, as we age, we mentally decline which worsens health in all aspects. If you are one of the lucky ones who remain sharp until passing, this doesn't affect you as much. If you are more average, the advice is that a social network of some sort will help you as you age.

There was the famous incident involving Gene Hackman. His care taker was his wife. The wife collapsed/died due to Henta virus and he passed a week later oblivious to what had happened to her. If Gene Hackman and his wife had more proactive support network (the kids or friends FaceTime them everyday), maybe this tragedy could have been avoided.