This flag was not handled by a member of the moderation team but was dismissed as a result of passing through the Low Quality review queue. I believe this happens simultaneously to your flag being presented to moderators but it appears that the review was completed before a moderator saw your flag.
At the time you flagged the item the user was below the threshold for posting comments but they have the power now. I would generally try to show a bit of leniency with this kind of post and give it some time, with an expectation that it is soon to be edited into an answer. In this case that has not happened so it is most certainly flag-fodder.
Please do continue to flag answers like this. If they are simply asking for clarification and providing no possible solution then they are, as you point out, a comment rather than an answer.
I have dealt with the post for now.
For future reference if a flag is marked as "disputed" then it was declined with the involvement of normal community members, if it is "declined" then a moderator was involved.