^ ENFPs mistake themselves for introverts in the layman's sense all the time. Lots of people are shy and sensitive as teenagers.
The part that is not bolded is more telling - he wanted to "protect the others". Championing again, parenting with Fi. INFPs parent with Ne.
I wouldn't disagree that he could be an ambivert in terms of the general idea of I/E, but I think he has more of a Ne ego than a Fi ego. It's not merely a matter of being outgoing nor expressing , but the role of the function in the psychology of the person (yes I'm referring to the Beebe model, but almost all MBTI models which build on Jung note these dynamics, whatever they happen to call it). The parent function is one we not only teach with but "preach" as a solution to others, which is why INFPs are more annoyed by people who won't see alternative viewpoints and ENFPs by people whom they see as bullies or oppressing individuals. This is kind of a projection of what brings a balance to our own ego (the auxiliary is a complementary force & is experienced as very positive).
Yes, each type can show some of both traits, but what is the person characterized by? I see this guy characterized more by Ne with parenting Fi.
Also can anyone think of one famous INFP male he even remotely compares to in his demeanor or expression? I cannot...
Robin Williams is not a great example of a balanced ENFP either. What are some other male ENFPs?