It’s actually a sound rebuttal mathematically speaking.
Given an infinite amount of tries, everything with any probability of happening, will happen. But because you cannot figure the probability against infinity, you end up multiplying infinity on top of itself and you get infinity. Something that has a probably of happening once every six times (say, rolling a six on a six-sided die) has a probably of happening six times if you roll the die thirty six times. You cross multiply and divide 1/6 with X/36 where X is the amount of times it should statistically happen with thirty-six rolls of the die. You end up with X=6.
Let’s apply this to infinity.
1/6 * X/Infinity.
6X/Infinity
X=Infinity
Anything multiplied or divided by infinity equals infinity. So you should roll a six an infinite amount of times given an infinite amount of tries. This probably equals 1. Infinity/Infinity is analogous to 1/1, even though mathematically it equals infinity again, just as 1/1 equals 1.
So what the article is saying is that there should be an infinite number of universes exactly like ours, even though the statistical probability of only one occurring randomly is so close to zero that one cannot possibly fathom it graphically on a number line where 1 is the statistical probability of it having to happen no matter what, and zero being the statistical probability of it absolutely not happening no matter what. It is so close to zero that most people would consider it a moot point and reduce the probability of the universe randomly generating into what we have no as zero.
In short, the multiverse theory says that there should be an infinite amount of universes that are exactly like ours, all randomly generated, despite the mathematical probability against it.
The God theory says that there is one universe, no others, and it was created and finetuned by God. The mathematical probability supports this (at least better than the multiverse theory).