If this truly is the case and you and @KYnuttrees have witnessed it to confirm firsthand that the flowers do in fact appear to be male and not hermaphroditic, then it does seem very unusual…
That said, the world is full of organisms that can change sex to continue their species. If a male clown fish (at birth) can change into a female and lay viable offspring, who’s to say a persimmon flower can’t pull a similar trick. It would seem to be a less sensational one compared to a fish.
With parthenocarpy and all the other mixed bags of funky things persimmons are capable of, maybe they don’t even need the right sex parts to make a fruit? Just talking out loud without any research to back it up over here.