I'm not sure what to say. I think some of it has to do with a bit of snob appeal. That is to say a person who spends $2,000 more dollars on a shotgun most certainly believe that their shotgun is better than a $600 shotgun. And so they must a sale any point they can to justify the existence of their own expensive shooter.
I can tell you that I went through two Ruger red labels. One had a split stock and a broken firing pin after much use. Google made it right. I sold it and bought one with a longer barrel set and it did okay. I think I had about four thousand rounds in the first one and two thousand in the second one. Both of them loosened considerably with use, but were still fairly tight and very safe.
A good bolt rifle wears it's barrel out on the inside. They can be re-barreled. A lousy rifle has the action stretch, and other issues, that's what was barrel wear. In my experience shotgun barrels last for a long time. Choke tubes may wear. On break open shotguns it's the locking pieces that wear out, including the hinge pieces. It remains to be seen if the g2 is made of metal that is just a little bit harder than dried chewing gum. But I tend to think that this gun will go well over 1,500 rounds. Look at it this way at the price they go for compared to others, buy two, sock one away, and you'll still be ahead of the game. And if the new gun lasts a long time, you can eventually sell the one you stored away for a nice profit!
I'm a pretty old guy and have played with guns my whole life since I've been about 10 years old. My experience says the g2 bobwhite is a decent gun.