Temporary relief may be what is needed under many circumstances. I'm personally quite clear on the roots of my depression, but that doesn't make it easier to cope with. For some people it's a mystery or problem that once solved, ceases to be debilitating. For others it's an endocrine problem, best treated with drugs. For yet others, it is best treated with cognitive exercise. Each case is different and dismissing a whole class of clinical strategies is no better than treating those strategies as a panacea.