I completely know what you mean, but most people aren't professional graders,and even those that are still introduce subjectivity into their grading. It's definitely clear that people hold a fairly wide variety of definitions for the term "Mint". In the card world, services like TCGPlayer, Star City Games, CoolStuffInc, etc, no longer use the term Mint. This is, in part, because few of the cards they sell are in mint condition, but because it's safer to say all the best ones are in Near Mint anyway. Even a rack of unused, uncirculated, chalky new chips might not be mint. How's the label placement? Are there shards of other colors in the base color? Split spots?
I tend to agree - if they're used, they're inherently not "mint". Others have more liberal definitions. Unfortunately the term causes more confusion than clarity these days.