Not everyone is capable because most of them are just too afraid to get in too deep. It's understandable because if they don't skilled enough, they might get into the same depression as the other person while some of the professional people are too skilled with their job that let the sufferer feel they don't compassionate enough.

We are our own savior. It's always been like that. When we rely on other people to heal, usually it will take a longer time, but when being left by everyone when we needed them the most, the resilient ones will realize and stand up for their own selves so they can heal faster while the opposite might be sucked in the darkness deeper and yet, they are the only ones who can save their own self. The other person can only help to a certain degree.

Wish the light keeps shining in your heart. :)