[spyder]

Because that virus editing nutjob could be the AI. It's true that without the physical "body" it's harder to do it but it could already delegate a lot of things to humans through computers, through ordering components and hiring people to do physical things without the individual workers or even the initial "prompter" realizing the end product would be dangerous. Or the prompter can have malicious intent, but the hired people and the world still would not know about the final dangerous product until it's too late.