The theory of gravity is also a theory. The bat origin is by far the most likely explanation.
China is stonewalling merely to hide its unwillingness to do more early in the outbreak and THEY are peddling unlikely alternative theories like the "frozen food from elsewhere" theory to deflect attention from their own failings. It's quite possible there will be no definite evidence to prove any theory ever, so we'll have to trust our best theory, that Batman Pepe was cooked and eaten by a sadistic Chinese Pepe.
China is stonewalling merely to hide its unwillingness to do more early in the outbreak and THEY are peddling unlikely alternative theories like the "frozen food from elsewhere" theory to deflect attention from their own failings. It's quite possible there will be no definite evidence to prove any theory ever, so we'll have to trust our best theory, that Batman Pepe was cooked and eaten by a sadistic Chinese Pepe.