Well the first issue is that the epilogue was apparently written before the series and the just tossed on at then end. Its a giant wall of 'Tell do not Show'. Granted Harry is terrible as a date in school and far more likely to be ready for dating after school and that whole offing the lich-that-managed-to-convince-everyone-he-was-actually-Cthulu thing. The whole epilouge reeks of 'Noodle Incident'.... the romance that won't be explained. In other words... I feel like I got robbed and missed out on a second series of Harry Potter books. The most glaring plot hole in the series is the one the second series of books fell into.
So basically to except Harry/Ginny as destined and cannon! is to except plot holes as the source of all romance.
The second issue is that the Harry/Ginny pairing of canon has no real explanation... at all. They never actually spent time alone together. While Ginny has lots of reasons to go after Harry... I'm confused why Harry would go after Ginny. She is one of the girls that he has the least chemistry with. Seriously...basically any girl who isn't a flatout enemy or rather older is one he has more chemistry with.
It also has the taste of fangirl instantly wins by bothering. Like in Naruto Fannon! where Hinato get Naruto and Sakura/Ino/NPC harem gets Sasuke based on the logic that they called dibs. It screams males are property called by first dibs. Their opinions will morph to your needs. It doesn't matter if you date scum (its actually better if you do)... get that ring on their finger and they will get mind wiped and be your perfect man instantly. Don't date the nice ones or they won't be around to cry on their shoulders if the creep makes his will save against your personality reformatting powers.
Basically, its the logic from 2/3 of the chick flicks that aren't about one person dieing horribly and slowly of a degenerative disease.
In short, I'm not against the Harry/Ginny pairing on principle, mostly its a matter of execution. That and (being on topic here) if you had an old, evil, gay wizard steering you into a mate he'd pick the one with the huge fertility bonus. Rather than say the girls that would have read extensively enough to catch on (Hermione) or reads eclectically enough to idea what is going on with the scar off the top of her head (Luna).
So basically to except Harry/Ginny as destined and cannon! is to except plot holes as the source of all romance.
The second issue is that the Harry/Ginny pairing of canon has no real explanation... at all. They never actually spent time alone together. While Ginny has lots of reasons to go after Harry... I'm confused why Harry would go after Ginny. She is one of the girls that he has the least chemistry with. Seriously...basically any girl who isn't a flatout enemy or rather older is one he has more chemistry with.
It also has the taste of fangirl instantly wins by bothering. Like in Naruto Fannon! where Hinato get Naruto and Sakura/Ino/NPC harem gets Sasuke based on the logic that they called dibs. It screams males are property called by first dibs. Their opinions will morph to your needs. It doesn't matter if you date scum (its actually better if you do)... get that ring on their finger and they will get mind wiped and be your perfect man instantly. Don't date the nice ones or they won't be around to cry on their shoulders if the creep makes his will save against your personality reformatting powers.
Basically, its the logic from 2/3 of the chick flicks that aren't about one person dieing horribly and slowly of a degenerative disease.
In short, I'm not against the Harry/Ginny pairing on principle, mostly its a matter of execution. That and (being on topic here) if you had an old, evil, gay wizard steering you into a mate he'd pick the one with the huge fertility bonus. Rather than say the girls that would have read extensively enough to catch on (Hermione) or reads eclectically enough to idea what is going on with the scar off the top of her head (Luna).