I think you must have missed the conditional "would" in your parent comment's second sentence. Whatshisface was not writing about our world with our universe'

I think you must have missed the conditional "would" in your parent comment's second sentence. Whatshisface was not writing about our world with our universe's physics. The "only" in his same second sentence is doing work there too, removing beta decay. You could object that such a hypothetical world might not say something useful about our world, of course. I would not automatically agree with that assessment, however. It depends on whether "only" also ousts gravitation of free neutrons (or isotopes, if they exist in that world) or other means of testing the masses of bulk collections of matter with different neutron enrichment. At the very least, we all seem to agree it was illustrative of a point about very weak interactions.