I doubt nuclear nonproliferation would've worked if U235 were 20x more abundant in nature, and didn't require much in the way of concentration via centrifuge. It would require a truly unprecedented level of international cooperation and surveillance to lock down AI development/deployment to a similar level as has been done with fissile materials.

But this isn't an argument against their point. If nuclear were far easier to make then every government would be far more authoritarian to prevent terrorist style nukes all the time. The average person would fully allow it after a few local nukes went off.

And it doesnt really matter if it was actual terrorism or false flags, the end result for either is the same.