haha don't have to harvest resources.... But what happens in warcraft 3 when you send 30 of your peons chopping on a forest. In just a few mins you have clear cut a huge portion and have lots of wood to build with. There is also computer control peons that you get that do the resource gathering automatically.
Then what happens when you tell 30 of your peons to help build a building... things zoom really really fast.
But, good luck trying to order people to do that though in game, most wont listen cause they have no team work skills.
How long have you been in LoD for?