Why is it more important to monitor your word choice in a professional environment than in personal communication exchanges?

In a professional environment, you are interacting with people you barely know and they are from different social backgrounds and most of them probably have English language as the second language. In such an environment, it is very important to chose your words carefully so that there will not be any chance of you been misunderstood. Words are powerful and they bring forth emotional responses from the hearers. Choosing the right words will help you to stimulate the kind of response you want in people in a professional environment.