Because being accepted by society significantly contributes to survival conditions, it's reasonable to worry about acceptance to a certain degree. That is why you probably heard someone say it's normal to feel discomfort before social exposure, for example, giving a presentation. However, societal standards consist of outgoing, extroverted individuals. Therefore, most people learn early enough to adapt to the environment, fulfill others' expectations, and overcome discomfort. The problem begins when they think everyone can do the same.