Why would you be very careful with a one-off script? The only point is the output.

On the other hand, if you actually care about the output, how do you know it's right, unless you review the script? I mean, if all you care about is plausible-looking output, you could have the LLM produce that, and skip the Python script entirely...

Eh, unlike some of my contemporaries, I am not as interested in merely plausible-looking output. I want good output each time, but I am clearly still trying to find a good balance.