Bron Bron - Plagiarizing?

I've been wondering why that LeBron James movie coming out is in my craw so damn much; instead of just letting things be and applauding a buncha kids doing something great, I can't help but think hey, if LeBron had played on MY high school team then gee, MYSTERIOUSLY, we would've been great too. I wonder how much of the games were "stand around and watch LeBron," and that's when it hits me on why I REALLY am dismissive of the whole thing - HAVEN'T WE ALREADY SEEN THIS MOVIE BEFORE?