>>13595506That doesn't change anything. Let's say that timeline exists. You're still going to die. Eventually the telomeres in your DNA get short enough that your odds of producing cancerous cells reaches 100%. Then you will die. You cannot beat this game.
Assuming a timeline exists where you didn't go to space at all is honestly a stretch though. That assumes that there was a quantum event that led to you going to space. It's also possible that in every timeline you find yourself in, you would take the opportunity to go to space.
Man-worlds isn't magic. Pre-conditions still exist. The law of non-contradiction still holds. There isn't a universe where it doesn't, no such universe can exist. It's entirely possible that that some decisions you make have no quantum component because of other events that happened before you were born.
For example, if you jump off a building, you cannot say that there is a world where you will suddenly gain the ability to fly and therefore not die. That's not true, there are no such worlds. Infinite worlds doesn't include things that are literally impossible. You might say there's a universe where gravity is low enough that you could survive the fall. But that gravity wouldn't allow the formation of planets, so you wouldn't exist. It's a pre-condition. You can't win.