There's a general bucketing in the modern world of all unhappiness being depression that should be treated, which I don't think really fits what's going on. There are absolutely cases where anxiety and depression are a medical issue which warrant treatment with medication, but there are also completely legitimate reasons for those conditions. If your lifestyle is one of never leaving the house, zero social contact, with the bank imminently foreclosing on your house then depression and anxiety are entirely appropriate - so long as those feelings then cause you to do something about the problem.