Recent insights indicate that confidence in autonomous security tools is waning among cybersecurity professionals. The primary concern is that adversaries are increasingly able to exploit the predictable nature of these tools, often referred to as 'rulebooks.' Instead of relying on sophisticated zero-day exploits, attackers can effectively anticipate and bypass automated defenses by understanding their operational patterns. This shift raises alarms for organizations that depend heavily on these technologies, as it suggests that even advanced security measures may not be enough to deter determined attackers. Companies need to reassess their security strategies and consider incorporating more human oversight to adapt to evolving threats.