Referee wants me to add a plot – because the paper has none
While there may be a way to add a very cool and colorful plot to my paper, I don't think it is necessary, it would be complicated to read and so I should add more text to explain how to read it.


It doesn't seem to me that you have really considered the reviewer's request seriously. You seem to think they should just be able to follow the formulas without any visual, thus putting the onus on the readers to do the work of understanding your paper. The onus should be, instead, on you to explain your ideas in the clearest way possible -- and this will greatly improve the impact of your work, as the reviewer says.

I find it hard to believe that there isn't anything visual you can add that would be helpful, no charts, figures, or pictoral examples. When I read technical papers, I have found that visuals that go through an example in detail are almost always invaluable for understanding, regardless of the type of research (very applied or very theoretical, etc.) Are you sure that there is nothing you can add?


  The paper still does not contain a single plot. I encourage the author to present some of their results in graphical form, which will greatly enhance the impact of this paper.


You seem to have taken some offense that this was not a useful suggestion, but I find it very unlikely that this suggestion is not useful.