I don't know if this is the only reason that fundamentals is not always stressed to players coming into tihs league....
What about high school coaches teaching fundamentals? If someone does go play at a division I school what about learning the fundamentals there? Also, there are players who have not been taught fundamentals per say but learn on their own. Special players like Kevin Garnett, Lebron James, and Kobe Bryant came into the league based on athleticism and turned into fundamentally sound players. While I don't think it is okay for these large corporations to try to funnel talent into their revunue stream down the line...I bet they have given away a lot of free stuff to players that never turn into anything later on down the line. The players that cannot learn that athletic ability only gets you so far don't make it in the NBA as much as you would think.
Honestly my personal opinion is the way the sports media glorifies the flashy plays over the plays with substance. I call it the Michael Jordan effect. As a young kid playing basketball you want to be the guy who makes the fade away, off-balance jumper with time running out. You don't want to be the guy who rotates to the right spot always. Why? Because when you watch Sportscenter you see highlights of players dunking with those ESPN commentators making goofy jokes and yelling 'OOOOOHHHHHHHHHH' in the middle of the telecast.