Definitely, we have at least one stable interest - seeing what's new on Hive :)
You are very right in pointing out the risk to one's mental health once life loses meaning... at least the meaning one found in doing a certain job and making money. Mental health decline goes hand in hand with physical health decline. But then seeing a doctor every other week becomes an activity to fill an empty life. Also, once you get whatever condition you also have an excuse. Life would be so much better, I could do so many things if only I didn't have diabetes or heart problems or whatever..