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This all seems like exploiting ambiguity about what your conditional probabilities are conditional on.
Conditional on "you will be around a supercritical ball of enriched uranium and alive to talk about it," things get weird, because that's such a low-probability event to begin with. I suspect I'd still favor theories that involve some kind of unknown/unspecified physical intervention, rather than "the neutrons all happened to miss," but we should notice that we're conditioning on a very low probability event and things will get weird.
Conditional on "someone telling me I'm around a supercritical ball of enriched uranium and alive to talk about it," they're probably lying or otherwise trolling me.
Conditional on "I live in
IMO, the anthropic principle boils down to "notice when you are trying to compute a probability conditional on your own existence, and act accordingly."
A really simple example, where the mistake is obvious(ly wrong), is "isn't it amazing that we live on a planet that's just the right distance from its star (etc.) to support life?" No, this can't be amazing. The question presupposes a "we" who live on some planet, so we're looking for something like P(we live on a habitable planet | we are inhabiting a planet), which is, well, pretty high. The fact that there are many uninhabitable planets doesn't make the number any smaller. When