I read a lot more SE sites than I'm a contributor to, but something I've slowly noticed is that there is a tendency to prefer making rules about questions rather than making rules about answers, even when there is a clear benefit (in my mind anyway) to the latter. I'm wondering why.
An example: a lot of the sites have rules to close questions that ask for legal advice. This makes a lot of sense! However a big topic of discussion on some of those sites is whether specific questions are valid and how to decide if a question is too similar to a request for legal advice (e.g., this question on Academia.SE that opens with "
We seem to have a very inconsistent policy with respect to questions on legal issues related to academia.").
Interestingly, all the sites with these policies that I've come across (academia, workplace, and freelancing come to mind) consistently put the onus of correctly interpreting their legal-advice rules on the asker of the question, who is far far more likely to have little or no experience with the community that wrote the rules than the answerer. This topic in particular is tricky because, in order to understand what constitutes a question on legal advice, you generally have to read some trail of long discussions buried in the meta site. Why don't sites instead state that answers giving legal advice beyond "get a lawyer" are out-of-scope?
Obviously this only applies to some rules, but I'm wondering why we so favor rules about questions over rules about answers, even while the site struggles to be welcoming to new users. Duplicate question and off-topic rules are easy examples of good question-based rules. Questions that are overly-broad are another. Questions whose answers are primarily opinion-based I think is somewhere in the middle. Why not have answers that are opinion-based be out-of-scope? In my experience, some of the most valuable sets of answers on SE can be found attached to questions that boil down to "Something happened; what would you do if you were me?"
(Apologies if this is a duplicate! I couldn't figure out what search terms to use, but also I feel like this has probably been discussed before.)