The Higher Being
Parkinson’s Law of Triviality - My biggest pain-in-the-ass

A nuclear reactor is used because it is so vastly expensive and complicated that an average person cannot understand it, so they assume that those working on it understand it. Even those with strong opinions often withhold them for fear of being shown to be insufficiently informed. On the other hand, everyone can visualize a bicycle shed, so planning one can result in endless discussions because everyone involved wants to add his or her touch and show that they have contributed.