Mature adults who want to grow their relationships and their networks will avoid people like this. You cannot develop a long-term mutually beneficial relationship with someone who deliberately works at not being cooperative, helpful, or encouraging (that's what nice people do).
Dale Carnegie probably spit out his coffee when he heard her say that. In "How to Win Friends and Influence People" he quotes Alfred Adler, co-founder of psychoanalytics:
It is the individual who is not interested in his fellow men who has the greatest difficulties in life and provides the greatest injury to others.It's a good thing Corinne is pretty (for now), because that and an utter focus on bottom line results (she's a drug sales rep) is likely the only reason for her success. It won't endure and all the "boring" nice people who've worked hard to build a network of other nice people will outlast, outwit, and outplay this nasty networker.