Caveat: I don't know the technicalities of the original method/research and am merely familiar with it through the media and business world hype. I wonder why

Caveat: I don't know the technicalities of the original method/research and am merely familiar with it through the media and business world hype. I wonder why a lot of things like this have to be marketed as "going to change everything" silver bullets. I'm all for teaching people the value of practice and persistent work at improving instead of putting it all down to talent or just innately being smart or not, but turning it into "you can achieve anything you set your mind to if you just want it enough and work hard enough" looks like a flat-out denial of any sort of differences in underlying abilities which is not going to do anyone any favors.