This is the Legitimate Reason as to Why Narusaku Won't Happen!!!!
It's because Sakura was Naruto's first crush. Think about it, how many people, in actuality, end up with their FIRST crush? I can't name a single person. If Naruto ends up with Sakura, then it's going to convey the message that if you continuously chase after the person you like, they'll eventually fall for you, when that's NOT how things work in reality.
Think about it, chasing after the girl you've always wanted that once shunned you, the same girl that was also your first crush, then eventually ending up with her?
Where exactly is logic in that? None, because that's not how relationships work!!!
So this right here should let everyone know that Narusaku was never going to happen to begin with.