Autonomy is just another word for automating decisions. And we can make cyber more autonomous. This has been proven in in-depth scientific work in top-tier research venues, a 2016 public demonstration by DARPA (the Defense Advanced Research Projects Agency), and new industry tools.
They’ve all proven that we can replace humans – or at least make them more productive – in cybersecurity by replacing manual human effort with autonomous technology. However, it is important to note that the primary focus of research is to show something “can” be done, not what “should” be done.