It's not entirely unreasonable if one truly believes that AI technologies are as dangerous as nuclear weapons. It's a big "if", but it appears that many people across the political spectrum are starting to truly believe it. If one accepts this assumption, then the question simply becomes "how" instead of "why". Depending on one's political position, proposed solutions include academic ones such as finding the ultimate mathematical model that guarantees "AI safety", to Cold War style ones with a level of control similar to Nuclear Non-Proliferation. Even a neo-Luddist solution such as destroying all advanced computing hardware becomes "not unthinkable" (a tech blogger gwern, a well-known personality in AI circles who's generally pro-tech and pro-AI, actually wrote an article years ago on its feasibility through terrorism because he thought it was an interesting hypothetical question).