There’s some strange inverse, where situations we KNOW are rife with cheating have few accusations thereof (bike racing perhaps), and those that are almost certainly very rare may also have few accusations (because it’s rare).

Sometimes you have to treat any accusation as “real” just to keep the cheaters at bay. (Cheating at online bridge is rampant, and cheating at bridge competitions was and perhaps still is fraught with many scandals).

It’s often common that the cheaters really ARE very good players - they’re just looking for less work, not a goal they couldn’t obtain otherwise.