well, for one, she is the typical protagonist of these kinds of novels, so it's a jab at the genre. another thing is that being "heaven-blessed" isn't so easy to achieve, that'll be important later on. the third thing is to establish J as a womanizer. the fourth, and most important reason is to show that he isn't almighty, and things can get out of hands even with being this OP. these kinds of things will be even funnier (and less controversial) later on.