Self evident?
Quests ask you to place buildings. Do you want those?
Yes. I need to place them in order to complete the quest. I want to complete the quest. Therefore I also want place the buildings, i.e. to have them in my city. Of course, I don't want them for very long. As soon as the quest is completed, things have changed. It's that temporal thing I was talking about. I no longer need the buildings, and therefore I no longer want them.
The state of wanting to do something is an integral part of the act of actually doing that thing. No one ever does anything they don't want to, simply because doing so is impossible. This is self evident; it follows from the meaning of the words being used. The only exceptions are things that aren't under the individual's control at all, and therefore aren't truly the doings of the individual, such as results of physical force (e.g. tied up and carried away, stumbling and falling), reflexes and ticks.
If someone puts a gun to your head and demands your wallet, you don't have to give it to him/her. You'll probably decide that, all things considered, it's the best choice for you, and you want to do the best for yourself, so you'll want to hand over the wallet. In fact, if someone comes around and tries to stop you from handing it over, you'll probably fight them, just so you can give your wallet to the robber. You want it so much that only physical force will prevent you.
Quests, of course, are much easier to avoid than the gravity that causes a fall after stumbling. They even place less pressure on you than an armed robbery does. There's absolutely no way a quest can make you do anything you don't want to do.
