That's it, exactly. VERY disconcerting, but the positive aspect is that it becomes so apparent that it's wrong that you have no choice but to get some outside input. And you learn to stop trying to fix yourself, really quickly.
Yes, exactly. I can imagine that an NT who becomes aware of their need for outside help would seek it as soon as the situation provided the insight needed to do that.
As an NF, I also bristle at the idea of anyone trying to meddle with me, uninvited opinions and attempts to dig out information that I'm not willing to give. Even as a child, I clammed up the minute I perceived an adult trying to extract information from me that I didn't want to share. But, I do know when I need help - I have that AHA! moment, when I'm given a revelation that I need to seek the outside opinion of others, because I know I need others to guide me. I know I can't do everything myself, even as much as I would want to.
Bottom line - I think both NFs and NTs, when mentally or emotionally afflicted, will do the same unhealthy things.
Always a possibility. Something to consider though, is that the mere act of "getting help" is not a panacea, and the methods of others are usually workarounds as much as one's own methods are.
No. There's no guarantee that seeking help will fix the problem, but refusing help is compounding it. And assuming that help will inevitably fail you, and that your method of self cobbling will fix everything isn't accurate either. I'm sure your self help method has failed you on more than one occasion.