I think it is a risk reward thing for the background check services. False negatives do not nearly hurt them as much as false positives. They are incentivized t

I think it is a risk reward thing for the background check services. False negatives do not nearly hurt them as much as false positives. They are incentivized to process candidates quickly and must limit the time they work on each profile. Doing deeper and time-intensive research has not benefit for them, so they find a plausible reason to put laborious profiles in the bad pile. What you call lazy and incompetent is probably a system working as intended where the collateral damage is accepted approvingly.