Yeah, I think that's accurate.
Somewhat related (maybe) - but my INFJ friend and I were discussing how, if in a conflict or whatever, we both naturally start out very fair, honest, not wanting to hurt the other person or get any more out of it than is justified. Basically, wanting to be diplomatic about things. But if the other person doesn't want to play that way, and lashes out or tries to take advantage of our niceness, we'll then shift to No More Ms. Nice INFJ. The other person is on dangerous ground at that point ...as we can be quite cutting and lethal if we need to be, and if the other person decides they want to 'play' that way.
(By the way - I'm not saying this applies to all INFJ's.
![Smile :) :)](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
And this would be a very rare situation anyway.)