It is a state designed to cope with very specific life circumstances.
It is an expression or energetic response that reflects something.
Depression is the symptom that shows you that something deeper is taking place.
Instead of trying to suppress that state, you can accept it, go with it, dive in it and while you do, you are surrounded by healing energies that support your journey.
It is a validation and acknowledgement of that state.
So why did nature design it?