Well, yeah. Sorrow's Furnace is the southern Shiverpeaks' agicultural center. Well of course it is, it's the place that green items drop. Hardly anyone there to do the quests? Obviously, the quests aren't required and give relatively small experience awards. There's no point to go to Sorrow's Furnace unless you want to farm green items.
And ArenaNet knows it. One could conclude that they built Sorrow's Furnace for short term replayabilty and "coolness" and long term farmability. In this respect it is successful. When it first came out, it was totally cool to go killing dwarves. These days, it's only cool to go killing dwarves if you're there to farm.
The 5-man team is laid back, really relaxing, and a decent way to spend time. You might get a Razorstone or one of the Bortak items, so that's pretty cool, because they sell well. Even if you don't, the tanned hides, iron, wood and dust that you take out of the place makes it a relatively profitable use of your time. You can go for a quick Oro run while you're waiting on your guild to get together for the event that's starting in a half hour; you can go for a quick Oro run when you have to leave for work soon and don't have a lot of time to dally in the game.
Rangers, mesmers, elementalists, I know that you're not part of the "cool crowd" for this run. Sorry about that. Go play somewhere else or log a different toon and come back. Or if you like, your guild can set up an Oro run and sub out a ranger as your stance tank or a me/n, me/e or an e/* for the SS nuker slot and you can go. PUGs won't take you, it's just how it is. It's like saying "Hi, I'm Michael Jordan. Can I play for your baseball team?" Sorry, wrong outpost. Deal with it. Take heart in the fact that the warriors are all here because they're laughed out of Tombs by all the rangers,
SF is farmarific, fun, and really laid back. I can go for a challenge somewhere else, the 5-man oro run is my relax time, and it's still relatively profitable.