You answered a question with a question, possibly a wise question, but nevertheless an obtuse reaction to the questioner's want of tactical knowledge. You were downvoted once and decided that one person's lack of appreciation of nuance meant the service as a whole has none, and that it wasn't for you.

I quickly conclude from this that you are quick to conclusions. I've found many topics on Quora which have accreted answers which encompass a range of nuance and even questions in kind. I may have even downvoted some of those answers, but I didn't do so in hopes that anyone would stop using the service.

In re: whether you just don't want to be on Quora or you are predicting its demise, the title of your post does allude to a certain implacable finality...