It has not yet happened because of the presence of at least a minimum of responsible players who both understand the consequences and care about the consequences (at least more than their particular political goals).
But there is no structure that prevents it from happening, no part of the machine that prevents a mistake.
There are also forces pushing it to happen.
The past performance of your advice is no guarantee of future performance, and it is particularly bad today.
I sincerely hope you turn out to be right, but if so, it will only be by chance.
