I think the threat model is that the majority are not run by cooperating malicious parties.
Russia, china and usa all dont like each other much so are probably not sharing notes (in theory).
Russia, china and usa all dont like each other much so are probably not sharing notes (in theory).
Basically, a variation of the prisoner's dilemma.
Also, those nukes we have pointed at each other are a pretty healthy hint.
"The simplest explanation is usually the best one."
Conspiracy theories are a logical reasoning black hole.
I personally feel it's generally best to avoid the mental Spaghettification.