As interpretations go, they can be more or less subjective. With that in mind, questions asking for them may make little sense. Of course, there has to be a however.
However, proverbs. Would you consider questions asking for interpretation of proverbs as valid? The sense of the proverbs may be obvious, and I would consider that a good question.
What about their origins, though? Since those can often be poetic, or lost in the depths of history, this can be subjective as well.
To extend this question's context a little, as an English learner, questions asking for interpretation help verify the understanding of the language. In ideal circumstances, the question would receive a set of different answers, evaluated via voting, through which I could compare how wrong I was.