You're mixing up words and concepts. I'm finding differences between concepts, by way of analysis, which is at the core of analytic philosophy. The senses of "natural" point to many ways of thinking of what's natural. We should be clear about which one we're talking about.
Black holes could be natural in one sense, but not in another since they're quite unfamiliar, for example. Have a look at the 16th meaning of "natural": "in conformity with the ordinary course of nature; not unusual or exceptional."
If black holes are exceptional or anomalous, so are personhood and highly artificial, intelligently designed societies.