You said the founder believes "there aren't and never will be" 4B people "worthy" of an urbit planet. I'm asking where you got that "never will be" part.

I think your reading of that bit you quoted is extremely uncharitable. I don't see where urbit is passing pronouncements on anyone's "worthiness". The way I read that quote is, "an urbit planet is server software, and there are way less than 4B people with a server to run it on."