Tex, nice flashback there, and I understand your suggestions, but prints are not cheap once you get to 8x10" or larger. All big prints aren't posters - most posters are printed large on cheap paper using 4-color printing - large prints are printed on heavy paper using more sophisticated printers.
Also, sure OS-provided calibration tools are better than nothing, but are pretty worthless in terms of getting accurate prints. For $80 or $90, you can assure yourself of accurate prints, vs. spending that much on wasted prints that you're not happy with because they are too blue, yellow, red, dark, light, etc.
Also, I don't see it as diagnosing a problem he doesn't have because an uncalibrated monitor will lead to problems, and the bigger you print, the worse it gets. While most people don't need a full-blown ICC workflow, I think monitor calibration and a printer who uses ICC profiles is the minimum you need for good quality prints. For many years, that's all I could afford, and I never had to re-do a print.