I think you raise some interesting concerns in your last paragraph.
> enormous amount of societal responsibility this puts on AI makers — which I, as a voter, will absolutely hold them accountable for
I'm unsure of what mechanism voters have to hold private companies accountable. Fir example, whenever YouTube uses my location without me ever consenting to it - where is the vote to hold them accountable? Or when Facebook facilitates micro targeting of disinformation - where is the vote? Same for anything AI. I believe any legislative proposals (with input from large companies) is very likely more to create a walled garden than to actually reduce harm.
I suppose no need to respond, my main point is I don't think there is any accountability thru the ballot when it comes to AI and most things high-tech.