Why are we obsessed with the lives of others?
It is another of the ways we rationalize avoidance of self, justifing distraction from doing things with a beneficial purpose. Those in the business of feeding the obsession create justifications to rationalize their chosen coarse. Not right or wrong, it's just what it is, and in the long term has no lasting meaning.
Referring to a well-known time-management quote,"Justification and rationalization are the most pervasive time wasters employed by human beings, in personal or professsional contexts." As hard as this is to accept for the majority, when you understand it and make an effort to follow it, you will be amazed at how much more you accomplish and with less conflict along the way.