If you are likely to make errors due to having to review too fast to properly evaluate claims, I'd expect you to lean toward denying claims so that your error would mostly be denying claims that should have been approved instead of approving claims that should have been denied.

That's because if your errors tend toward approving claims that should have been denied, your are going to have a higher than normal fraud rate among your approvals, which might raise suspicion that you are in cahoots with the fraudsters maybe taking bribes to approve them.

Denying claims that should have been approved, on the other hand, probably has little risk of getting you personally is trouble.

Hence, there is an incentive when rushed toward denial of claims.