Well guns don't kill people on their own. They just sit there. AI might actually be different and just kill people on its own.
The concern with AI, and the purpose of the OG paperclip maximizer thought experiment, is that the outcome could be extremely divergent from the intent of the original person pulling the trigger / sending the prompt.
Still more likely that a person types "kill all people" (or something tangential where this is the logical conclusion).
Guns make violent crimes (including common stuff like robbery, domestic disputes, or even road rage) much more deadly then it needs to be.