Bionicman76 said:
Why is disinterest a legitimate reason for non-approval in the first place? Instead of just rejecting poor quality stuff?
Disinterest is the default disapproval reason, especially when we "skip" a post to show we looked at it and move on to other posts. It's also a way to tell it's not that bad or/and we're unsure about approving it, usually with a short message.