As others have said, some are not cut out for it, while others seem to take it in stride. I dated two providers for quite a few years- one loved every minute of her work, the other was clearly not in the right business for her personality type and emotional needs. If you get into commercial sex work for the wrong reasons, like my one friend did, then it's going to be a constant battle.
But maybe one of the other reasons this board had less of a response than the GD board is as we get older, we tend to know how to be alone without being lonely. As mature adults, we usually know ourselves better and are less emotionally needy. In other words, we tend to have our shit together.
I personally could never survive my current lifestyle or circumstances as a 30-year old- I'd have been very unhappy and lonely. But now, I'm twice that age and I'm much more low maintenance than I was in my youth. I think providers probably are similar in this regard.
Having said that, I've also been friends with a few providers exactly because they could let their hair down and share their work experiences or frustrations with me, knowing that it was a socially "safe" environment. I think its important for providers to have a few trusted friends that understand exactly what they're doing, because everyone needs to vent once in a while.
And for the guys, I think TER fills that need to share experiences with others and know that you're not the only one in your situation, whatever it may be. And if you want that face-to-face interaction, you can always go to local meet-and-greets that some of the TER boards organize periodically.