Maybe its one of those "content will be added at a later date for this item" things? I dont even know what a "terraheim mod armorers bench" is. Been playing over hundred hours.

The game isn't finished. If anything i would say its about 1/3 way finished content-wise. Its highly probable that its future content item that they added as a teaser.

This is the one game, I wished would pickup speed on updates and completion of a finished product. Every big patch messes up my world build. At least i can transfer everything to a fresh world via inventory and character. But i definitely want to see the end product as to not have to continually rebuilt my fortresses/etc. (hopefully with a complete world creation kit to remove these somewhat ugly algorythm landmasses that randomly generate via seeds.)