I thought this was a weird conclusion. I think of my self as pretty open to experience (maybe there's a unintuitive definition for this I'm unaware of?) But that is a conclusion I don't really relate to. I guess I'm open to new things but quite so "go with the flow". Seems contradictory out loud but I can't be the only person who feels that way.
Also, I feel like this article seems to suggest mastery is achievable if you just work hard enough. My life experience with my own attempts to master things suggests otherwise. I don't know if everyone has it in them to actual master something.