The USA tech industry did start with hard-tech. The hint is in the name "Silicon Valley". The spur in innovation in the American tech industry started with companies working on projects from the defence and aerospace industry. Along the way they lost the plot, mostly during the dot-com bubble when the investment/banking/family-office industry(that does not understand tech) got heavily involved into it to make quick money! That diversion from hard-tech to click-bait tech has continued even today, because the investors want quick return whereas for hard-tech you have to have a lot of patience to see positive outcome.

One country that, to some extent, successfully emulated the early Silicon Valley type strategy is Israel that has encouraged lot of personnel from defence and aerospace industry to form commercial ventures.

Not many countries understand this point; many go by the PR bling that is spewed by the USA internet companies(mostly pushed by get-rich-quick minded VCs) and try to encourage this type of non-essential startups in the hope of being "successful similar to Silicon Valley". The definition of successful is obviously is being set by these get-rich-quick VCs rather than the country itself. It is not surprising that you see lot of the VCs/Accelerators/Incubators fund me-too type companies in other geographies in the hope that they will be acquired by companies in the US! It is all bait-and-switch game and not meant to develop R&D and innovation that benefits societies at large. Benefits to the society, if at all there is one, is the by-product or after-thought of this whole process.