Cynicism is a Drug
Like any addictive substance, it loses its effectiveness over time and thus the dose is increased until the user is destroyed. Crashing and burning. A self sabotaging vice like any other.
A siren that beckons to give up hope. To succumb to the demons that make life miserable instead of looking for productive ways to work through it all.
While one must not be naive, or overly trusting, approaches can be made that don't rely on such attitudes as a crutch.