The US Military's Failure to Pivot to Small Unmanned Technology

I want to bring in the technology revolution that we're seeing as well because you make AI products, you make unmanned autonomous products. The fact that a startup has to take the technological frontier here suggests that the US military missed something, right? I mean, you wouldn't have to exist if the US military was all over these technologies and clearly owned the tech frontier. So what happened? Why do you think this institution, US military, which succeeded in big manned technology did not do as well to pivot towards smaller unmanned technology?