I'm sure the government's mission is also to develop an AGI that benefits us all.
Ideally no one person or entity controls such a thing. But, would I rather have a Government, or a corporation control AGI? If I had to pick one of two evils, the Government would be the lesser of the two.
If a company has it, US intelligence will have it, for sure.
If US govt has it, it might take a decade, or so, to leak out.