I think that's the issue I have with using these tools so far (definitely professionally, but even in pet projects for embedded systems). The mental load of having to go back through and make sure all of the lines of code do what the agent claims they do, even with tests, is significantly more than it would take to learn the implementation myself.
I can see the utility in creating very simple web-based tools where there's a monstrous wealth of public resources to build a model off of, but even the most recent models provided by Anthro, OpenAI, or MSFT seem prone to not quite perfection. And every time I find an error I'm left wondering what other bugs I'm not catching.