As a professional, we tend to come into contact with a wide variety of humans.
Not all of our experiences are stellar.
As we move from location to location in our career, we find co-workers who have different styles, different work ethics, and different attitudes about what they do and why they do it.
Sometimes those goals, attitudes, and styles don't jive with our own style.
We either have to assimilate or abandon our style and attitude to conform.