From time to time, people come to this site to seek confirmation of something that they already believe about some aspect of English language. That is, they post questions of the following kind:
I have noticed this linguistic phenomenon: . . . . I think that the explanation of this phenomenon is . . . . Am I right?
Now, if the hypothesis that is proposed within the question is wrong, an answer can be given that explains why it is wrong. If the hypothesis is incomplete in some way, an answer can be given that develops it. If the question is off topic, it can be closed.
But what is to be done if the question is on topic, the hypothesis proposed within it is true, and it fully explains the phenomenon? In such a case, the correct answer would be ‘Yes, you are right’, but such a short, simple answer would be below the standards of this site.
Leaving the question without a posted answer creates an impression that it is somehow unanswerable or extraordinarily difficult, which may not be the case. More importantly, the absence of an answer that confirms the questioner’s hypothesis creates a vacuum, which sometimes ends up being filled with wrong, misleading, or otherwise unhelpful answers.