I think that when people find something that works for them, they quite naturally talk it up.
If you find a way to be sober and share it on the boards, your voice will be heard too.
There are many ways to be and stay sober. Some ways are more evangelical and organized and some are more free-form. They are all valid.
I agree that addiction is selfish and isolating, like an abusive relationship. I don't agree that random connections are always a good thing, especially when a person is newly sober and vulnerable. It took me a few months to develop safe boundaries and discernment again after I quit drinking.