Now, this questions is actually an extension of the previous question. If the other had an actual solution to fixing this bad feature of yours. Would you listen to them? Would you take their advice and adhere for their remedy? Or would it somehow put you on the defensive?
This question gives you insight into whether or not the person values personal development enough to assess and accept objective criticism. We all have flaws but some people are always defensive when their flaws are pointed out and reluctant to accept help even if the advice is beneficial.
Think: Do you really want to live with someone who seeks attention through their problems rather than actually finding a solution to them. What if one of their negative habits was affecting your relationship in a big way but they were unwilling to acknowledge and work on it.