People literally kill themselves for being depressed. Not because they want to, but because depression is so bad. It's like severe chronic pain. Poverty has many definitions, and some are quite compatible with being moderately happy.
>Poverty has many definitions, and some are quite compatible with being moderately happy.
Yes, but whether millions of the people in poverty are unhappy or decently happy in their daily lives, the condition of being extremely poor itself still often kills, and in much greater numbers than depression does, regardless of how ugly the latter feels to the person suffering it.
The question is then how many person life years are lost due to poverty, and how many person life years are spent suffering from depression, and how bad those are in comparison. Would you rather have a shorter, happier life, or a longer, depressed one?