"Hackers aren't a problem because we have cybersecurity engineers". And yet somehow entire enterprises and governments are occasionally taken down.
What prevents issues in redteam/blueteam is having teams invested in the survivability of the people their organization is working for. That breaks down a bit when all it takes is one biomedical researcher whose wife just left him to have an AI help him craft a society ending infectious agent. Force multipliers are somewhat tempered when put in the hands of governments but not so much with individuals. Which is why people in some countries are allowed to have firearms and in some countries are not, but in no countries are individuals allowed to legally possess or manufacture WMDs. Because if everyone can have equal and easy access to WMDs, advanced civilization ends.