Short thred on theories about this: most frequent answer is they're the ones getting tested. But that would imply that if just random celebs have it when tested, it's already widespread in 10s-100s of millions. Possible objections/other explanations:
How is it possible that so many celebrities, politicians athletes etc. are testing positive for it? The overall numbers are still quite low, even in Chyna/SK so how is this happening?