I've helped so many people do the VOG I can basically do it with a blindfold. This weekend alone I logged around 7-10 hours in the Vault of Glass alone over 5 or 6 runs. I carried 5 people who had never beaten the Vault before through the entire thing. I put together a team of 4 of my high level friends just so I could carry my level 24 friend through the raid, and yes we beat it. Helpful people are not gone, they're there, they're just too busy helping people out to be everywhere at once.