I think the question in my mind is "dangerous to who and when?"
Is AGI an existential threat? Probably. But on what time horizon? Through what mechanism? And can we evolve and collaborate with AGI instead of de-facto competing with it?
None of the AGI warning people (Bostrom, Yudkowski, Barrat et al.) have come up with a plausible chain of events that leads to human irrelevance or extinction. They always make a few assumptions and then claim "and then exponential growth happens" and boom everyone's a paperclip.
The USG doesn't have a position at this point and it's ill prepared to react. In reality if there is some kind of world ending gray goo scenario that an AGI creates - nothing the US or any other Government can do will matter. I think that's about as likely as Roko's Basilisk being true though (eg. 0% chance).