I can't speak for the others, but I feel pretty stupid when I have a problem that I can't clear off rapidly, or a problem that is chronic or recurring (like my health, money issues, etc). I have no idea how it got into my head that I could stomp any obstacle to death (perhaps it's an internal wiring thing) with enough persistence and never be a "burden" to anyone. I've been made fun of and told to just "get over" problems I have which only reinforced my need for secrecy. I'm not trying to withhold information - I'm just playing my cards close to my chest so that whatever is unlovely about me won't be a burden or offensive to you (and as to my enemies, so they can't get at me with anything I haven't already allowed them to see). I share the same level of uncertainty and personal insecurity of compromised INFJs.
I seem to think that my flaws are way worse and more loser-y than everyone else's. Having someone around who felt it necessary to "drop me a peg" every time I started to gain some height has done my head in on that subject.