Actually I was thinking somewhat along the lines of Luccio giving a new warden one of the silver swords. As long as the warden has the necessary slots, the sword then becomes his. Could a channeler get an enchanted item in a similar manner? Or would his lack of artificing ability stop him from having such an item?
I see what you're saying now.
1) I wonder if Warden Swords may have been handled better as Items of Power (YS 167) but because their intended recipients - Combat-focused Wizards - are critically low on Refresh Points to spend, they were worked in as Enchanted Items instead so that any Wizard would be able to have one if they were supposed to. It does become a precedent in the RPG rules, though.
2) Because it takes up the Wizard's Enchanted Item slots, the normal "lending" rules don't apply. The "lending" is a part of its backstory, as Warden Swords are intentionally rare Plot-related Items that a character either should or shouldn't have, based on his background, and people aren't building comparable new ones per the fiction. And while the backstory indicates one person makes these, full Wizards would be able to come close to making their own. I haven't broken down the build for the Warden Sword, but there may be some rules-bending to allow them the way they are handled in the fiction.
So if a GM agrees that belonging to a group (similar to the Wardens) would come with a particular Enchanted Item used by all its members, regardless of their own abilities, and presumably created by some central artificer like Luccio, then I can see a justification for a Focused Practitioner having an Enchanted Item he could never have himself built. But I'd imagine a GM would have issues with "I met a Wizard Artificer and saved his daughter from Ghouls, so he made me these Enchanted Goggles that fry peoples' souls, despite me being an Earthbender and having no experience with the Spirit element."