This really hits close to home because I do often wonder if it does "matter". When the audience do not appreciate the three hours I spent on the title's kerning or decision on the thickness of the boarder or the difference between ultramarine to navy, I do feel a sort of defeat that can result in a "why do I bother" attitude. But the next time, I would still put in the effort because as insignificant as it is, I do notice it and I believe it does make an impact in the viewer's pleasure. Design is a lot of the time a struggle between satisfying the employer and holding onto the designer's own concerns. And even though most, like the author, might not see a difference or even undermine what the designers hold dear, there are people who will notice, if not appreciate the details.