I can't say I'm surprised that you've misinterpreted what the external world thinks about this. You do seem to use primarily Ni/Ti; I think you may actually be INFJ with underdeveloped Fe because you seem to understand the external world very poorly.
You are proficient in both iNtuition and Thinking, but you use both only in terms of their introverted forms and your ideas on typology are purely subjectively validated as a result.
Extreme extroverts are overly dependent upon validation from others/the external world because their introverted functions are underdeveloped.
Likewise, in your case, extreme introverts go too far with subjective validation of their own ideas because they don't pay enough attention to external ideas and criticisms. Without a reliable source of external information factoring into your strong conscious thought processes, your two dominant introverted processes simply drink their own bathwater. Such is the problem with lacking a strong extroverted function.
(This is how unbalanced Ni leads to conspiracy theories--introverted functions left to their own devices have no access to any external information and just self-validate until the cows come home. INFJ Charlie Manson thought the Beatles had written messages specifically and personally to HIM because he was viciously anti-social and totally out of touch with anything going on outside his own head. He needed an extroverted function...that's why these double-I dominant or double-E dominant types always end up so unbalanced; they're almost entirely dependent on either internal or external psychological validation, both of which are necessary for a balanced worldview.)
As with everything there is an ideal balance, but you're not going to reach it by pretending extroversion can be understood in purely introverted terms.