This site is supposed to be about all forms of writing equally. But, as has been noted before, it is actually dominated by aspiring and hobbyist fantasy fiction writers. We have discussed how to attract other writers in How do we encourage participation by non-fiction authors? and How can we attract questions from all the OTHER writing domains that are on-topic here?, but the response to this question, Documenting the no-args call of a command line program leads me to think that a big part of the problem may lie in the on-topic rules, or at least the interpretation of them.
For fiction writers, the prohibition on critique requests and what to write questions make perfect sense. Without those rules, the site would be inundated with bad fiction samples.
But fiction is different from other writing disciplines. It is the most free form of all writing disciplines, and along with so called "creative non-fiction" and poetry, the only form that people do without a defined objective in mind other than vague dreams of fame and fortune.
All other forms of writing serve a specific purpose, usually a commercial purposes, and they are done by professional people with professions goals. There are no amateur technical writers. The many professionals for whom written communication is an essential but secondary job requirement are not amateurs either.
One of the biggest differences between commercial writing and what we might call art writing is that most commercial writing follows, or can follow, well defined rhetorical patterns. It is possible to ask very specific questions about how to handle a specific rhetorical problem in commercial writing. Documenting the no-args call of a command line program is an example of this. It is asking how to handle the specific case of documenting the default behavior of a CLI utility when no arguments are specified.
This is a rhetorical structure question of a kind that really cannot occur in fiction because fiction does not follow a highly structured rhetorical forms. There is no way to answer a question this specific in fiction without proposing actual language. But in technical writing, you can propose a very specific ad hoc rhetorical structure and explain the reasons for its use without actually writing the content itself, which is what I did in my answer to that question.
Because it is a field based on highly structured rhetorical structures, questions like this are the bread and butter of technical communication and related commercial communication disciplines. They can only be asked and answered with highly specific cases. If we rule this kind of specific question off topic as either a request for critique or asking what to write, we might as well rename the site "Fiction Writing" because the on topic rules will make it impossible to have useful questions and answers about most forms of commercial writing.
Nor do I believe that there is any need to apply these rules to questions about commercial and technical writing. We are simply not going to see the same kind of floods of critique and rewrite requests we would from vast hoard of aspiring novelists. Commercial and technical writing questions will only ever come from working professionals trying to solve real business problems.
I think we need different rules for technical and commercial writing. Either that, or we should rename this site and throw all our support behind the Documentation SE proposal on Area 51 so we have a place to transfer technical writing questions to.