There are two major differences there, each related to one of the primary reasons (IMO) that people do stupid things like that:
Reason 1: Profit motive: No one's going to be making a profit off of hooking an AI up to nukes.
Reason 2: For the lulz: This is the kind of thing that happens when you have very broad access to the elements in question. Since access to nukes is very tightly restricted, and their usage controlled by significant parts of governments, it's vanishingly unlikely that either a conscious collective decision will be made to hook up an AI to nukes for the hell of it, or that someone will be able to do so on their own.
And yes, I know that there are lost nuclear weapons, which means both that a) there are some out there not under government control, and b) governments can be careless with them—but frankly, any non-governmental actor known to be holding a nuke would have to be considered a top-level threat no matter what they had making the decisions about whether and how to use it.
Reason 1: Profit motive: No one's going to be making a profit off of hooking an AI up to nukes.
Reason 2: For the lulz: This is the kind of thing that happens when you have very broad access to the elements in question. Since access to nukes is very tightly restricted, and their usage controlled by significant parts of governments, it's vanishingly unlikely that either a conscious collective decision will be made to hook up an AI to nukes for the hell of it, or that someone will be able to do so on their own.
And yes, I know that there are lost nuclear weapons, which means both that a) there are some out there not under government control, and b) governments can be careless with them—but frankly, any non-governmental actor known to be holding a nuke would have to be considered a top-level threat no matter what they had making the decisions about whether and how to use it.