So the short version of this is that the "big 5" personality traits aren’t as universal as we thought.
It’s also good to remember this as we look at the importance of context in behaviour and grit. In Range we learned that you may be very gritty, in things you care about and not gritty in things you don’t care about. In that case it would be mistaken to look at...say school...and say that a student isn’t gritty and thus will fail.
Maybe the subjects they have to take in school aren’t anything they would choose to work on. I know that happened to me in much of school. High marks in a few courses I cared about, and then almost failed in others I didn’t care about.
Context is a big deal in so much.