Yes, I think what you wrote explains what HIT really is best, at least how Arthur Jones advocated it.
Some approaches are a bit too extreme, like what Mentzer preached in his last years.
there are many kinds of HIT,,, most extreme version is not the best way to train,, this science and real life training has show to 100%.
too much volume not good,, too less volume not good,,,,
also failure is not must to grow,, many cases stopping one rep before failure is better overall..yes sometimes failure is ok but all the time no,, it is too much for most people....