Defeatism about the feasibility of plans for disarmament and ordered peace has been the most calamitious of all the errors made by democratic governments in modern times.
The stadium expansion is currently at the feasibility stage and has to go through that.
How can you make informed decisions. . . ? The key seems to be to gather experts who are knowledgeable and passionate about the subject matter, and have them cooperatively discuss a series of questions designed to explore the limits of technical feasibility. They must strive to reach the best decision rather than to persuade each other.