Someone will always have to prompt the AI, it can't just do that on its own. Or rather, maybe it can (you can just prompt it to "kindly do the needful" in a completely unspecific way) but the results won't be any good.
>The construction worker it replaces isn't going to start managing a team of robots construction robots
Some of them will. You've slashed construction labor cost to 5% of what it was before. With that and a similar reduction throughout the supply chain means we're going to start building a lot more stuff.