"V1 is not the decision speed for all circumstances."
It is not the decision speed under any circumstances. The decision (to stop) must have already been made, and the first stopping action carried out by then, otherwise there is no decision to be made. That's the point of having it.
But I don't think that's the point you were making. Are you saying there are situations where you would call "stop" after V1? I can assure you every training department I have worked for/with will give you an argument on that..