depression is the ultimate motivation. despair and sadness is a gift. If everyone felt content and comfy being inactive then nothing good would ever happen. People who suffer "real depression" are really people who have built up a tolerance to the horror of not doing anything with themselves, like a hoarder who becomes acclimated to the stench of filth in their home.

But feeling vaguely bad is pressure to change. It would be worse to be vaguely happy, allowing the horror and despair to accumulate unseen in the invisble corners of the mind.