Because Fox didn't identify the problem, they didn't fix anything. All they did was report the problem. The TSA had already identified the issue through their own audits and taken action."it is a serious issue, which hasn’t been fixed, and now Fox has alerted everyone."
..... and so, Fox have had it fixed. Again, why do you think Fox has not made the aviation industry safer?
Now, if Fox had done their own undercover investigation and identified a loophole that was being used to compromise safety... that would have made things safer. But that's not what happened here.