Yes, it is constructed. But Annie gave us a warning - even if it lasts a while, the system is finite. I mean, look at what we were able to do today. We were able to create something out of apparently thin air, but only have enough for a certain number of world-changing actions.

[ Nope, she is not going to call them wishes, ever. ]

Maybe it's the way I was taught, but I'd rather do as much as I can with the least amount. That's why I keep leaning towards using the efforts only for things we can't create from found materials.