User blog comment:Zathronas/Analysis by an author: Volume 2 episode 9: Search and Destroy/@comment-24.31.13.227-20141003035806

Is it odd that the girls gave those answers?

Blake, I think, hinted at the reasons, if I remember right, when Oz asked her "What are you?" in their whole conversation. I would have thought that leaving the White Fang would have prompted Blake to do some serious introspection and already come up with a reason as to why she wanted to come to Beacon and become a huntress.

And then Weiss and Yang I thought would give more personal reasons. Yang maybe something with her mother or just family in general from what she's experienced as a child. Maybe something involving family for Weiss too. Maybe something to flesh out that rebellious thing she has going by being a huntress instead of taking the cushy Schnee heiress path.

I just thought the three would have thought about this already.