I think the "pride" factor is what scares alot of folks (esp newcomers). We think that our S's are too "proud" once they leave to come back. I've come to a place where I don't see it as pride so much (at least with my H) as their own fear. Fear of rejection and inadequacy. It's sad that any of those things would bar them from coming back. Mostly b/c I think of the regret and torment they'd live with.
I use to always think it was pride but you are right. How can you help them see that if they are not willing to speak ..well, I guess by sincere actions on the LBS part.