Most universes in this scenario have a cosmological constant close to what we’ve measured in our universe, so while the range of possible values would be huge, the skewed distribution implies that the value we’ve observed is nothing special. For such a multiverse, you should be no more mystified by our universe’s having a cosmological constant value 10–123 than you should be surprised by encountering a sixty-two-pound Labrador retriever during your next stroll around the neighborhood. Given the relevant distributions, each is the most likely thing that could happen.
This directly contradicts his earlier statistical approach and presumes by faith that what we experience is, by default, the most likely outcome. Without that assumption, all this collapses.