Besides, infinite universes doesn't mean they'll collectively give you a mutually exclusive and exhaustive set like everyone is for some reason assuming. You could just as well get the same wrong number in all of them and kill yourself off permanently in the entire multiverse.
That's the nature of true randomness, if you set up a dice throw a million times they could just as well all come up as six. Incredibly unlikely, but possible.
Uhm, no. If you use quantum events, like radioactive decay, or the usual quantum particle experiments, or (supposedly) an app like Universe Splitter [0], you are guaranteed that the two different possible outcomes will both occur, according to quantum mechanics (if you believe in many-worlds, which is out premise). And then you can build up a binary number of arbitrary size from a sequence of such experiments. When you perform the experiment N times, there will be branches for all N-bit numbers. Or just use a QRNG service like [1] which does it for you.
That's the nature of true randomness, if you set up a dice throw a million times they could just as well all come up as six. Incredibly unlikely, but possible.