This is why reading the whole post is important :)
You seem to think I'm suggesting the use an image generator for plotting. Don't do that, it will screw that up, image models are not made for that. The use for AI here is to save 5 minutes writing the code to generate the plot, or to edit the style (again via code) of the plot.
If you do plt.scatter(x,y, c="blue", marker="o") that is a function call in Matplotlib. Its API notoriously sucks. Most Python plotting libraries just create convenience functions around this library because although the API (actually there are two and the documentation is not consistent on which to use) is hot garbage, and the documentation is labyrinthine, the plotting engine itself is powerful.
> What llm do is to simply lower human value, not remove it entirely.
The value in a plot is not the exact code used to make it (beyond the code being correct). The value is in the visualization giving the reader an "ah-ha" moment. I would much rather take the 5 minutes I save writing a function call, and use it to spend more time examining the plot itself.