Part of what's at work here is a cognitive distortion, something we tell ourselves - it becomes a self-fulfilling prophecy. Not every non-medical intervention requires a metric ton of willpower to implement. Being medicated in itself requires dragging your ass out of bed to see a professional, get a proper diagnosis and prescription, actions that in other contexts are rationalized as something "too depressed to do". People are more motivated to get medication because they see a clearer, faster path to results and the alternatives do not appear so decisive and clear.