I feel bad for her, a lot, but I enjoy the writing and creative process too much to fully focus on Amo. I mean:
1. Look at this panelling! Time and time again, Urana-sensei keeps breaking my expectations in half, damn.
2. Look how the abuse and misguided rationalisation of what happened to Amo makes her actively be a part of the plot to begin wtih. Due to what Angels did for ther and what the courier did TO her, she seeks more poeple, more love, she pops out here and there in the Forbidden Zone, probably being used, probably also hurting people who meant no harm. That's how the rumors begin, because she really doesn't keep secrets, that's how our guys arrived here and that's how to plot moves forward, with the Cleaners (hopefully) saving Amo.
3. I do admire how the change was not too abrupt in Amo. Like, she didn't just do a 180 and killed the courier, she was still clearly under his influence, but another influence made her actually oppose him. If he didn't fall out of the window, she would've probably died or get even worse.
4. So... must've misunderstood something. Thought ever Giver can use somebody else's Jinki, just not in the same way nor with the same skill. If that's not the case, let's think. If it's uncommon for that to happen, Rudo is an anomaly and Remlin's situation is rare, then maybe Watchman Series is all Jinkis? It's all meant to be inherited like Gob's pen?
5. If not, then maybe it's just about perfect matches. Let's say somebody else would've been a perfect match for Rudo's gloves. That person could use it as a Jinki, while - let's say, Nijik - could not. In that way, we might eventually see one of our protagonists take somebody else's Jinki, as it will be more suited to them!