I have dealt with depression and related issues my entire adult life and rarely ever had anyone to talk with who really understood me. I have had friends and relatives to talk with but they could mostly show support/comfort rather than true understanding. It is so nice to have a whole community (more or less) of people who really understand what I have and am going through. The many ages, life-styles, locations, experiences make PC a place rich in diversity and you never know who you might make a connection with. Just like other experiences in life, you largely get out of it what you put in.
And it is normal for any online forum to have more readers than posters. I read many but only post in a few. That does not say anything negative about PC, rather it says a lot positive about PC! Not everyone feels comfortable posting on a public forum. If anything I've posted here has helped even ONE person in the world, I feel it has been well worth my time here.