There are really two main sides to this issue. Opponents of such a question likely value generality and questions that are more likely to help future users.
Proponents likely value being able to solve a specific problem. Let me give a formal list of the pros and cons I see of allowing such questions.
-Cluttered site of many very similar questions
-Questions and answers that are unlikely to be directly applicable to anyone but the OP
-Many poor quality questions are likely to be in this form
-Allows specific problems to be addressed, whereas allowing only general questions is likely to leave out problematic or unique language features
-Give more questions and answers for other users to see
-Allows learning by example which is preferred over generalizations by many
-Many of the poor quality answers that would be of this form could likely be closed as opinion based instead
Anyone feel free to add to this list if you have points that I have not thought of.
To give my opinion, I think that while disallowing such questions would save a good deal of housekeeping for the site, the good questions that would be missed out on make it well worth allowing it.