The question you provided as an example is basically yet another reason why the answer to your question is no. I mean, look at it: The question itself is certainly of no use for anyone else. But, as dly's answer points out well, the actual issue this person had is a very common one. Quite few people know that NBT data of items in filled chest slots needs to be wrapped in a "tag" tag, and most people do it wrong the first time they use filled chests containing objects with NBT data. This way, and also for the reason that dly pointed out very well what the issue was (and also because of the helpful tips dly included), while answering the question for itself is only useful for that one person, dly's answer is very useful to many.
Of course, answering the question does not provide any guarantee for such a situation. The case shows very well that, in order to be useful to many, specific questions have stronger requirements to the quality of the answer. An answer like yours on the same question might have been very useful on a broader question, but on a question as specific as this one it's of no use for anyone else. The way dly answered it is the right one: Providing information for more general cases, while at the same time showing how to apply them to this specific case. It's not about answering specific questions or not - it's about giving good answers to them.
EDIT: Oops, my bad. I messed up which answer was which one. Anyway, you can learn a lot from dly's answer. I must point out, though, that your answer is still good - it answers the question. dly's answer, however, is exceptionally good, and several points that make the difference between a good answer and an exceptionally good one are what makes answering very specific questions valuable.