Hahaha no, I made that up. But it sounds good. I would think once we learn ourselves up to an honest journeyman level, we would refer to our self as a leathersmith. I am not a journeyman in leather. I'm not even considering myself an accomplished apprentice yet.
But in our modern world we have so few opportunities to learn a skill from a true master craftsman.
Take carpentry in the south for instance. 50 years ago a journeyman carpenter would put an entire house together. But, in today's world there are so many sub contractors that all skills have become specialized to some degree. You have different crews for form work, framing, electrical, hvac, sheet rock, tapeing and floating, cabinets, trim, painting, plumbing, roofing, and flooring.
After over twenty years in construction I feel I could build an entire house from scratch. I can do some really amazing things as a journetman tradesman. But even now, I don't consider myself a master carpenter.
Why? Because, I'm honest. That's why. I can't do "all" of the things listed above at what I consider a master level. I have never had any inside woodshop experience. I've never built furniture, operated a lathe, or a jointer. But I have done some wicked cool things in the field with ingenuity and minimal tools.
Wow, kind of went off on a tangent there, sorry.
So yeah, holstier sounds good.