Evolution is search. These projects create demand for high tech manufacturing, this alone is a net positive. The money isn't burned in a pit, it is spent employing people.
Then why don't we give everyone a job? Why don't we do even more "searching", without any restriction? Let's spend, spend, spend government money. If your theory is correct, it can be nothing but a "net positive"...
No, you're being ridiculous. We must stamp out this notion that everything that feels good, is useful. Sometimes it's just a waste.