Because American exceptionalism, grit, fair play where our system doesn’t let anyone put their thumb on scale; no sir, the American economy is not at all “regulated” in a generic sense of the word, to serve certain interests.
American tech companies had free money thrown at them. That regulation of economy is why tech succeeded.
Most software products are unimpressive CRUD apps (before his death Steve Jobs called most web apps minor features hardly worthy of all the investment). Success of tech in the US has little to do with American genius and everything to do with government welfare… which is bad though so we pretend we’re all genius hackers instead