I don't understand. Why does my current life win every instant atm? Why is it so much greater than your proposition? Why don't we all instantly collapse to what you described?
Moreover, if the theory is true, it is happening all around us, all the time. Every consciousness that has ever existed, human or otherwise, is still in existence in some branch of the multiverse.
It's a pretty horrifying theory.
And people seem to be captivated by these memes, because the fear is great. It similar to eternal damnation in hell meme. Just look for how long it worked, and it's still working. The logic is simple, it's too dangerous to ignore such a threat, even with seemingly very small probabilities. But that still doesn't make it possible.
Logical traps founded on wrong assumptions.