Agreed except for the part about no such thing as partially flaggable.
We either need a downvote as an alternative to flagging or continue to use flagging in that capacity when it fits.
I'm thinking user downvote (or flag) should be nerfed quite a bit so that it's still the moderator's prerogative to literally take down a post.
I suppose if there were no user flagging the comments section would still provide a place for a dissenting view or feedback. The thing is if I see posts here offering unsafe medical advice or the like I want to not only speak out against it but cast a vote of no confidence.
Edit continued: But to a moderator two users with differing opinions about what's acceptable medical practice could only become viewed as biased whichever side they come down upon.
Can anybody be considered the oracle of all things true? Certainly no moderator should assume such a role.
So while upvote is a powerful tool for demarcating the wisdom of the crowd the ability to downvote should also come as an important tool for judging the social consensus.