The number means that you are deemed to be an objective listener. A person with no axe to grind when answering a phone to a distressed, overwhelmed , mentally ill and possibly suicidal caller who needs contact with another human being.
Most of us are lucky enough to have our own objective ears when we are going through a hard time.
A friend who will know how much sympathy to furnish, how much plain speaking is required to help and how much clarification is needed for the murky clouds of upset to be shifted away.
To us, the majority, it is almost unfeasible to think that some people have no one to turn to when their black dog surfaces.
Yet, for whatever reason, so many people don't have that friend to lean on when things go to shit
And that is a huge crime in my book.