Science is like that. The problem is not with science or with this material not being super-conducting. The problem is with how science is explained in media. Failing to test hypothesis is a critical step in the scientific method.
It's important that public understand the difference between a preprint in arXiv, a paper in a serious peer review journal and the truth.
We've seen a lot of miracle cures during the covid-19 epidemic where all the support was a bunch of preprints (and some of the preprints were horrible, I read a few of them to write angry comments in HN).
A paper in a serious peer review journal (if possible/relevant preregistered and with a randomized controlled group) is much better evidence, but it still can be wrong.