Attackers Don’t Guess and Defenders Shouldn’t Either

This piece argues that organizations often suffer a “coverage illusion” from tool sprawl and static assumptions, and recommends continuous validation aligned to real adversary techniques (e.g., MITRE ATT&CK) to measure actual control performance. By prioritizing evidence-based testing and focusing on attacker-relevant behaviors, teams can reduce complexity, improve prioritization, and build demonstrably resilient defenses that address real exposures rather than theoretical risks.