I can only reason about infinitely many universes if they're sufficiently similar to my own universe. But in that case I might as well just forget about the who

I can only reason about infinitely many universes if they're sufficiently similar to my own universe. But in that case I might as well just forget about the whole infinity thing since they're all independent and average out. If something is worth doing here on Earth then it's worth doing. Also the whole "acasual" thing never made sense to me. What I do doesn't influence anything in another universe by definition, so other universes shouldn't influence my decision making at all.