Take the world of sport, for example: when a sportsman joins a new team, it is he who must work hard to improve his skills and it is he primarily who must adjust to playing the styles and techniques of the team, not the other way around.
This is efficient and enables the team to function as a team instead of as a set of individuals. That said, the team should appreciate that the new entrant makes most of the efforts of adjustment and that the team can become stronger as a result of the new entrant.