Yes, and you don't freeze it there. You don't, as it were, get to a place where you say "The Act must have had that meaning then, so it didn't ..." You are not in that territory at all. You are in the territory of asking a current fundamentally important constitutional question. This court in particular, I hesitate to say, but this court in particular has shown itself to be well aware of the concerns about the law reaching conclusions which the ordinary man and woman on the street simply would not understand.
If you said to the ordinary man or woman on the street, "Do you regard the fact that a referendum has occurred to be remotely relevant to the question of whether or not the Government can give Article 50 notice?" the answer would be, "Of course it is."