Taking small steps to solve big (especially personally existential) problems can be significantly less daunting that solving the world in one go. Obviously, getting everyone's stress level down to 1 would be best, but improving even a bit to get it down to 3 is a (gigantic) first step.
That makes sense. I guess I read it as '3 is the goal' rather than '3 is a step in the right direction.'
Why not 1? Is the only way to work effectively to be moderately stressed?