I get that it supposed to work like that and maybe sometimes it even does work, but it really seems a lot of potential problems with little advantages. I think "write down a couple of words that describe your character" is almost as fast and much less potentially problematic than "pick one of these nine categories that manages to somehow be both too vague and too confining".
That said, having like a list with suggestions for motivations or personality traits could probably be kind of useful for some people. It's the idea of turning them into distinct groups and making them an objective reality of the setting that bothers me.