My pet theory for these is that they’re like a test of skill for metalworkers, and that they would be put on display as proof of their capabilities. They were often found in safes with coins, which I think supports this theory. You wouldn’t want some rival metalworkers stealing your skills display and making it so nobody trusts them anymore.
My issue with ground news is it doesn’t give any weight to funding sources when making its’ bias ratings, which makes it easy for billionaire-funded media conglomerates with a “neutral and unbiased” front to fly under the radar.