So what happens when you have no interests, no hobbies, no cause? And for those that do, but lack the time or financial resources to persue them? What then?
Once you have the financial resources, _then_ you tackle the problem of no interest/hobbies/causes issue - which, i say is relatively easy to tackle as long as you have money; try different things until something sticks!
That's the kind of person I'm talking about
Either they have not tried everything, or they have imbalances or an illness that makes them feel this way. If this is true, there should be no shame in visiting a doctor or therapist of some sort. Otherwise, depression would set in sooner or later and get worse.