Yes, this is essentially what Shog9 said, with added emphasis, catering more to the string of now-deleted comments than the question as it stands.
High-quality answers are the most important thing here.
It's easy to forget that when you're dealing with lots of flags and lots of review decisions. A red mist descends and everything substandard gets a flag, or closed or deleted.
You expend all your flags. Job done, right? No.
It's fine if that happens occasionally, but you might need to step back, look at the big picture. Our goal here is not to flag, close and delete everything, rather we're here to foster good questions, and great answers and anybody doing something toward that end is a star.
So say we get a mediocre answer. Perhaps it's link only or is a little garbled, but there's something helpful there. Flagging to deleting that post isn't the best thing to do, resuscitating is is.
- Edit to make posts make sense.
- Edit to expand link-only posts into something that could work without the link.
- Edit to keep older posts relevant for every release.
If you can do something like that, your contribution is worth infinitely more than anything that would have just destroyed that post. You've also just shown the original writer what we expect from their posts. So many birds with one stone.
But as Shog9 Says, it's disappointingly rare when somebody is selfless enough to go through that process. So rare that we really should celebrate the times when it does, not haggle over what happens to the flaggers.
Having a flag declined like this does also serve to show flaggers what they should have done. And if that happens a lot, perhaps a short flag ban —and they are short— is a useful device to make people step back and wonder what else they could do. Maybe some of that editing they keep avoiding?
Either-which-way, carrying a flag just because it used to apply is beyond stupid. I see your point about a third way out, but again, I think having the occasional flag actually declined serves to display that it wasn't the right decision and you could do better next time.