I think it might be deeper than that. I don't feel that the US government, on it's own, is incapable of drafting up reasonable legislation. The problem is that the US government is 100% for sale to the highest bidder, and corruption runs deep (we just call it "campaign contributions" as if that makes it better). If sensible regulation is proposed, it'll last 30 seconds before the good senator from [some self-driving car company's home state] has turned it into a document crafted to drive business to his "contributor".
This isn't a political statement as it cuts across both parties, which renders it all the more insidious.