“The film has some dumb ideas (handing all your nuclear weapons over to an AI and making it impregnable)”
These days we hand over nuclear weapons to a senile pervert who hates white people.
What could possibly go wrong?
I thought Superman took care of it!
Well, there are other people in the chain before the weapons are launched. They may or may not go along. There have been many stories and movies about that possibility. A good short one is the opening scene of “War Games” (1983).
https://www.youtube.com/watch?v=s6aCpS0-yls