Well, actually it shows that the people doing the design are not the people who are most concerned with colour accuracy. For critical work, that would usually be entrusted to a prepress agency who colour-correct images on calibrated monitors before they go to press. Designers often bypass prepress these days because automatic profile-based colour matching is good enough 90% of the time. For serious work requiring high quality, you wouldn't find the designer doing it him/herself, nor would you find the colour correction being done on an Apple display or similar mid-range LCD. Or an LCD at all, most likely (with the exception of that LED backlit thing whose manufacturer I can't recall).
Cheers, MK.