Yes, I have already built such single-value scorecards. Strictly speaking, graphs are never "needed" over a table of numbers, but including a bar chart does show the relative magnitudes much better. In my particular use case, we are reporting values of certain decisions over day/week/month time horizons. The results will be used to highlight the most valuable decisions, as well as which decisions have become more/less valuable. These results will be widely shared within my organization, and used for work prioritization. The decisions and associated $ values are generated by a 3rd party tool.
If I decided I was content with "raw numbers," I would just share around the text-based reports that also get generated by the 3rd party tool.