This is all a horrible development for the overall future of humanity, but it's the world we live in now. At a minimum hundreds of billions of dollars will be siphoned off from more beneficial uses over the coming decades, and the risk of major accidents will increase. The worst change is of course the fact that the odds of a complete societal collapse have increased dramatically.
Almost all of the world's nukes are controlled by aging old dictators or aspiring dictators who are surrounded by sycophants and treat competence as much less important than personal loyalty. Geopolitical risks are only going to increase as these rulers become more erratic and demented.