I am not saying you are wrong about “one universe”—you should just be aware that your view is highly controversial.
Personally I don’t think we have a clue either way.
I wrote: “As far as I know, there is no reason to believe that there is more than one universe.”
You wrote: “Personally I don’t think we have a clue either way.”
I don’t see a huge gulf between our positions.
Perhaps my view is controversial. That there is more than one universe is controversial also.
I also hold that there are only two sexes. I will make some allowance for those few cases of people born with XXY chromosomes. I reject the view that there are more than 100 genders, each of which must be taken seriously. As you can see, I am no stranger to controversy.