First of all, think of it as progressions, not reads. Reads are when you look at a defense and make adjustments based on scheme, or what a specific player does, i.e., the strong safety.
Progressions are when you go from one receiver to the next and so on based on a pre-determined sequence.
JV's fades to KD were first progression throws, based on the fact that the receiver was facing single coverage, hence no need to go through the progression.
In fact, if he progressed beyond that opportunity, he would have lost the chance and he could have realized that the safety who was not helping on the fade was helping on another receiver, possibly Herman.
Basically, once you progress past an option, you lose that option. Accordingly, it would go against the odds to make that progression.
Can someone else break open? Sure. But, if they don't, it would be a huge risk.