Levels are not the only important factors when it comes to crafting, the resource quality and tools used also count, aside from a bit of luck. Right now someone with a pretty low level (0-5) can equal Harnquist's work. Not because of their skill but by using the high quality stock that is available. Using low quality stock and depending only on their skill, they'll produce worse weapons.
What needs to happen is the NPC prices of weapons have to rise to be more representative for the work spent to craft such a weapon, that way a crafter can make some decent tria. Essentially, the same effort spent doing any profitable task in-game should yield more or less the same amount of tria and PP on a similar skill level. Last time I checked Devs are working on balancing things out so let them work and then re-evaluate what they did.
