There is a big difference between invention and refinement, as you noted.
I'm just taking issue with the agreement to "almost almost all major technological innovations been rooted in early military usage." Yes, many technological advancements have been primarily designed by and for military usage. However, many, including some of our most important technologies, have not. The printing press is probably the most important technology of the second millenium, and it was a purely social project -- designed to make the Bible easier to reproduce.
The internal combustion engine was, to my knowledge, first designed for use in mining operations. The telephone and audio recording were scientific inventions that had nothing to do with the military at the time of invention. The understanding and ability to harness and use electricity were similarly scientific discoveries.
While the computer is often credited to the military (for work on early vacuum-tube technology used for ballstics trajectory), it goes back to Charles Babbage and mathematics. The military refined it, but did not have a hand in inventing the technology.
In fact, I would stress the military's role in refining technologies over its role in creating them. The military is excellent at finding promising technology and pouring the necessary funding and manpower into it to make it viable, something that the inventors, who are typically individuals or small groups, can't do on the same scale. So the viability of many technologies can be credited to military research, but not necessarily the creation or invention in all instances. Even so, there are many inventions and discoveries which owe little or nothing to the military at all.