Rhetorical questions come in a few different flavors, but they all share the understanding that they are not meant to be answered. I suggest you do the opposite, though. Answer all the rhetorical questions.
In a sense, rhetorical questions are a challenge to think. Thinking is great and wonderful, but you should do more than just spin your wheels. Do more than ponder a rhetorical question, seek an answer.
It is galling to be so arrogant as to think that rhetorical questions have an answer. But they are worthless if nobody ever tries to answer them. Rhetorical questions are important. They are the questions we ask specifically because we don't know the answer to them (and because we really want to know).
We may never be able to find a neat, clean answer to the questions that have plagued generations of writers (and people in general) before us, but if you try, you may find the answers that work for you and satisfy your curiosity. In that sense, you have gotten the most you can from a rhetorical question.
Is there any good reason to not answer rhetorical questions?