Why are missiles expensive?

Missile technology is a kind of cutting-edge science and technology, which gathers the resources of various scientific and technological fields in society. Many researchers have tried hundreds of times over the years, wasting a lot of manpower, material resources, financial resources and energy before they can be shaped and finally mass-produced on the production line. All the money spent during this period will be counted as the final price of the missile, which is what we call a patent. Scientific and technological talents in missile development also have very high subsidies and bonuses. Therefore, missiles cannot be cheap. Similarly, the F-35 of the United States brought together 10 countries to invest in research and development, and Laasan of Russia jointly developed it in order to share the development cost.