For the purpose of the “big 5” personality studies, things like “agreeableness” or “openness to experience” are more or less marketing terms that allow professionals to discuss a real and complex topic in a shared language. The “big 5 personality theory” is well established based on peer reviewed and repeatable experiment. The foundation of these studies is real, not fuddy dutty irreparable nonsense (the big 5 comes from the newer corner of psych that doesn’t have a reproducibility crises and has solid scientific grounding and rational for their experimentation and data analysis). I think you should do a bit more research into how the context of the paper instead of doing a drive by analysis based on what I would consider to be an ill informed basis fo analysis of the results.