If I'm interpreting Kolgena correctly, stars in FS should emit radiation like black bodies. If so, then I agree. This is what I had intended when I remade the stars of the FS universe with the help of Admiral Nelson. My problem was that the retail stars did not accurately represent their real-life counterparts (Betelgeuse was white, etc.). In order to simulate stars that radiate as perfect black bodies, I had to refer to a spectral classification table that has listed RGB values which represent the color of the surface of a star based on its effective temperature. For the most part, the colors of the stars are now portrayed more realistically.
So this leads me to ask, how do the current stars have spectra that are monochromatic? You say that it looks like radiation is being emitted from a small portion of the EM spectrum, but in reality, we can only detect light from a small portion of the EM spectrum without aid- the visible spectrum. A black body function can be generated with any initial temperature. The color that we would see from this star depends on how the intensity of light is distributed across the visible spectrum. So as you've mentioned, the Sun has a peak intensity near 5000 A. However, within the visible region of the EM spectrum, the intensity is almost evenly distributed. This why the Sun is white outside of Earth's atmosphere. Light intensity of a hot star that peaks in the UV will be higher at shorter wavelengths, causing a blue hue to dominate. The opposite is true for cool stars.
Only one RGB value is used per star. This value is not a representation of peak radiation from one wavelength, but radiation across all wavelengths in the visible region of the EM spectrum. This same value is also used to light the environment. So this is, more or less, a simulated approach to represent black body radiation. This was not the case in retail, as pure colors were often used.
If we're talking about retail only, then I apologize for misinterpreting. If we are talking about the current mediaVP stars, I'm not understanding the issue.