I'm not surprised Jung thinks of T as a judging function, as he was Ti dom. Since Ti was his gatekeeper function, it necessarily judged for him what went in and what went out. I think he just lumped F in with T because it was neat, and he wasn't quite sure what to do with F (which further supports that he was INTP as well), because his definition of Fe is just completely inaccurate, and I've studied it extensively, as least in his P.T. book.
And I can perhaps see that because I'm Ni dom.
But my Fe does not make judgments. It interacts with other living things, colored by my Ni predominatly, and other functions as necessary. It is actually my Ni, my gatekeeper function that makes any and most judgments that happen, followed by my less dominant Si . I think, indeed, that an Fe doms' Fe makes judgments, but that is because everything taken in is filtered with Fe, lending it a judgmental feeling.
As to your last sentence, I doubt an F or T dominant would agree. Their personality is such that most everything they experience is colored by their thinking or feeling. Yes, their brain might perceive or intuit massive amounts of data, but how much is usable will be determined by how it works with their dominant function, and will be dependent upon their environment at the time. Also, our ability to tap into large areas of visual perception in the brain might be more linked to our sense of sight, and not so much Se, for example, which implies an additional step of consciously understanding what you are perceiving.
As an example, IxTPs are always filtering everything through their Ti, thinking about how to make more workable connections in processes, to make things work, or to figure things out (even people). Their perception, therefore, will be limited by this dominating function, at least most of the time, in normal circumstances.