"Okay, so now back to awful practical difficulties."
"If you can make a powerful magical weapon out of an affinityless metal, that nobody needs any specific affinity to use, anybody who hears about that immediately wonders if you're the Summoned Hero. Or, I did, and it is not the case that everybody else in this town is much stupider than I am."
"We can't pass the guards on any registered dungeon unless you have an Adventurer's Guild registration that you can't get without identity papers you don't have, and even if we manage to find the right sort of criminal with the right sort of connections to fake those for a lot of money, the Adventurer's Guild will fingerprint your affinities when you register, and when they see you have all six affinities they are immediately going to think 'whoa who is this all-affinity person I've never heard of before and is she possibly the Summoned Hero'."
"We can't cross the borders out of Midvale County unless you have forged papers and get a travel permit, which I think we can do without anybody fingerprinting your affinities but is still going to cost money."
"I am... still trying to figure out exactly how we can navigate all this. I don't suppose you ran into any interesting, incredibly competent criminals before you ran into me? Or the daughter of the City Lord? On the theory that reality tries to set Heroes up with useful Companions."