A typical day's queue of flags on Stack Overflow is around 1000. If your flag isn't tended to the minute it's raised, it's going to be because of the 900 or so others already there taking up time from having to verify the flag reason is correct in the first place.
There are countless things way less important that are raised and people's time is wasted on less important issues, like people fighting as to who in the "close police" is going to close first, say, anything looking remotely like a duplicate.
While all that energy could be used instead to detect things like voting rings where people already have hundreds of rep and are polluting both SO and Google with fake questions, fake answers, fake edits, etc.
If nothing is done and if voting rings flags get queued at position 1000 in the queue, then it's just a matter of time before voting rings reach 10 K rep and are able to create a real mess.
