No, the code is generated by a tool that's "smarter than people in many ways". So which parts of "thinking, testing, and clean up/rewrite" can we trust it with?

Trust is a function of responsibility, not of smarts.

You may hire a genius developer that's better than you at everything, and you still won't trust them blindly with work you are responsible for. In fact, the smarter they are than you, the less trusting you can afford to be.

The marketing is irrelevant. The AIs are not aware of what they are doing, or motivated in the ways humans are.

Very little, until it stops being stupid in many ways. We don't need smart, we need tools to not be stupid. An unreliable tool is more dangerous and more useless than having no tool.