Reality is subjective; that is the entire basis of the Madness. It would not work if the realities were shared, but then, if reality was shared, would there be any such thing as madness?
Madness string 1032
And do you think, that if you do not go and do it, another you will? Another you will make it so? Well, maybe they will. But it won't be you. And you won't be certain. And you'll have to live with that.