The policy regarding on-topic
There are some recent questions on meta that ask for the actual policy on subjective or not perfectly formed questions and answers. Obviously, this is still a bit obscure for users (and moderators), which definitely is not a good thing since it solicits discussions and grudges between users.
I think one way to handle this is being more specific in the help center, since this is the reference point commonly referred to.
The page I have in mind in particular is this one, where it is specified what is on-topic and what is not.
I deem this page to be too unspecific and fuzzy.
On one hand, this is good as it does not exclude possibly valuable content. On the other hand, it allows for too much as it stands IMHO and is one of the reasons we have some grudges and much work for moderators here in comparison to activity and traffic.
Even worse, it stands at odds with other pages like the one about deletion of answers that imply much stricter rules especially regarding opinion and subjectivity.
Therefore, I would like to start a discussion. Answers can suggest any and every change thinkable in the text. The comments are explicitly allowing for discussions here (as opposed to the main site) and I would like to see many suggestions and honest votes.
How this should work
First of all, of course this in and of itself may be discussed in the comment section as well and is not set in stone.
My personal idea is that any answer with 6+ overall score will be enacted via edit. Therefore, please do only suggest one particular line/formulation to edit per answer. It will be better to discuss and vote very specific edits since this is a sensitive issue and one of the most important pages of the help center for reference and new users. This also means that if you really dislike a suggestion, I beg to downvote and discuss in comments.
In the end, this is about producing a current status of views and arguments about how the site is supposed to work like according to the community members, i.e. you. Therefore, there is nothing inherently wrong, but in the end, it may very well be that your suggestion is put down by the community.