In this context, "persuasion" is an idiom just means something like "background" "has this attribute".
It doesn't have anything to do with the typical meaning of "persuade" because English is weird.
It doesn't have anything to do with the typical meaning of "persuade" because English is weird.
The modern usage of the idiom came about as a joke - as though someone's sex or ethnic heritage were merely a matter of preference. Over time, the original sense has been forgotten, and the humor has been lost through repetition, so it is now just an odd phrase.