The explanation for should be closed in the new flag dialogue for questions reads (boldface mine):
This question is completely unclear, incomplete, overly-broad, primarily opinion-based or is not about [site’s topic] as described in the help center, and it is unlikely to be fixed via editing.
The explanation for very low quality in the flag dialogue reads:
This [question/answer] has severe formatting or content problems. This [question/answer] is unlikely to be salvageable through editing, and might need to be removed.
I consider these wordings problematic, as many such posts can actually be fixed – by the poster. However, if I am not very much mistaken, one should not wait with such flags until it has become apparent that the poster has vanished or no intention of fixing their post.
Moreover, often somebody other than the author can fix these posts by applying an inappropriate edit. While it is clear to most high-reputation users that this not taken into account here, it can cause confusion amongst low-reputation users (remember that flagging is available at 15 reputation), who may get the idea that it is appropriate to radically change the post themselves.
I thus propose to change these wordings, e.g., to something like:
This question is completely unclear, incomplete, overly-broad, primarily opinion-based or is not about [site’s topic] as described in the help center. It needs to be fixed by its author.
This [question/answer] has severe formatting or content problems. It has to be salvaged by its author, and might need to be removed otherwise.
Note I did not explicitly include something like
can only be salvaged by its author (without making an inappropriate edit)
as I considered this to be too complicated. I am open for suggestions of better wordings that address this issue.