I’ve had almost 30 MCs over 15 years at this point, and only 1 incident that wasn’t perpetrated by myself. With discipline, common sense, and a little knowledge about how these things work, it’s not really hard to keep from damaging them - unless you have physical issues like shaky hands etc.
That said, I get the abundance of caution, and 11K (or thereabouts) is a lot of chips to place in one basket. What’s really galling here is that damage from user error ALWAYS leaves obvious physical evidence. In this case, it sounds like one of those rare unfortunate scenarios that ties back to a true manufacturing defect. Not necessarily the cartridge maker, but perhaps supplier of the fine wire etc. @mijostyn is an experienced high-end analog aficionado, and I think it's safe to assume this cartridge was in good care by him. And NO ONE in the sales / distribution chain has even stepped up to say "hey, sorry - maybe we should at least take a look into this". AT A MINUMUM. Not a good look for any of the involved parties!