Here's my totally uninformed theory: Ernie came up with a build plan that did all the things it needed to, and he stuck with it. The people who buy them know what to expect, and the fit and finish issues only matter to people who don't plan to destroy them. There's no need for perfection when impermanence is both expected and planned for.
Customs and collaborations exist to broaden the market, but I think Ernie makes most of his money from the very knives people come on BF to complain about. Again I could be wrong about all of this, but oh well...
It's really not the fit and finish that bother me. Honestly, knives that get used in the field get beat to crap anyway. It's the fact that I can get a knife with better materials and better fit and finish for the same price or less. I just don't understand that.