The original reuters article quotes Meta as claiming that making them harder to find by removing them from the system. This article doesn't offer any evidence to suggest that Meta is lying. This is lazy and poor reporting as far as I'm concerned.
The issue as I see it is that these searches are run when testers look for them, not on a regular basis. If Facebook can detect them, why let them be displayed in the first place?
Reuters: Restaurant hides unsanitary waste from food inspectors by hiding it in dumpster.