I think, (and I'm being presumptuous here), everyone knows there are no true 'bins', and that people are complicated, and every characteristic is from in a continuous metric, and there is no good or bad.
I also think that this is why bins are used. It's not an attempt at correctly describing people, but rather a simplification, using general terms in order to communicate the traits in a, best-effort, meaningful way.
I could never adequately describe how I _truly_ am as a person. All I can do is draw on gross simplifications that you yourself can translate to a meaningful metric based on your own experience.