At what point did the author of the article say this was to "fix introverts"? They positioned volunteering as a way to combat loneliness which has nothing to do

At what point did the author of the article say this was to "fix introverts"? They positioned volunteering as a way to combat loneliness which has nothing to do with being extroverted or introverted. Loneliness is a feeling, being an introvert is a personality trait. There are some introverts who struggle with loneliness and some who do not thus this article is a relevant suggestion for some and not for others.