Because introverts, silent (concerned with self-centeredness), at least usually with good manners (arrogance) and appropriate behavior (deeds) who are skilled in listening and physical fitness, speech, psychology, biology of calmness. Attractive to people with emotional emotions.
Anxiety-stricken individuals who are happy that other people are initiating with them can easily get caught up in (interpersonal) relationships, both tired and dissatisfied.
In an extroverted society, where happy people thrive more than personal thoughts, the difference between an introvert and an extrovert is that an introvert is often unconsciously deemed guilty until proven innocent.
119.089 SRY