I think critical thinking is not necessary, depending of your personal circumstances you can be better off with a great net of friends that can help you to find a good job. For example, my wife found a good job because she, besides being wonderful at work, has a really splendid net of friends who can speak wonders of her. I don't think that being critical or having critical thinking skills is going to help you in your career, sometimes is better to be quiet and let the powers be. I remember a story of a very good broker with wonderful ability that didn't follow the herb, he make very good predictions but he lost his clients, financial markets are not for critical thinking, is like a beauty contest (in due context by Samuelson).