You don't notice lettering in comic books until its done badly. Same thing with editing in movies. Those things are invisible to the untrained eye when working as intended, and raised to an artform for the initiated. It's the same with graphic design; you don't "see" what a good job someone did until you see what a bad job another person did.
In this vein, there are a lot of people out there in the Artisanal Craft Dice arena who have a basic understanding of Adobe Illustrator, enough money to order a bunch of raw materials, and they are off to the races. I see a lot of mediocre to bad dice being sold on Etsy and other online sites. To quote Tyler Durden, stuffing feathers up your ass does not make you a chicken. But there are some people out there who are doing it right.