Introverts are just as capable of focusing on the needs of others and helping friends in need as extroverts. I think what you’re describing is social anxiety, not introversion. Social anxiety is a condition that may be helped by professional intervention.
I think introversion and extroversion, which are neurotypical traits, and the conditions that lie on the opposite ends of the mental health spectrum (extreme shyness, social anxiety, narcissism, etc) are different, and the differences between them are important. There are a lot of kids who struggle with some aspect of reading, writing, and math, but even though they share some traits with people who are dyslexic, dysgraphic, and dyscalculic they aren’t the same. If we ignore differences then we miss people who have real, treatable conditions.