I'm not sure what point you are trying to make. It's still a different physical prediction and evidence of QI over non-QI.

You can always just be lucky; maybe gravity causes the Earth to move randomly and we've just been lucky to see if orbiting the sun for the past few years.

So the physical prediction is that I will never die, unlike the alternative physical prediction that I will die at some point. And therefore every second I remain alive is evidence for the MWI. If not having died before makes you think you're immortal more power to you. I don't find that reasonable.