Apologies for being contrarian, but let me flip things around: Perhaps people who are able to benefit from practice enjoy it and tend to do more of it.
I get excited learning about the latest C++17 features and used to love reading stock exchange specifications, which most people would find about as exciting as a root canal. I find it rewarding because I can apply what I learned and feel a sense of satisfaction. Conversely, I've always sucked at golf and could barely stomach the half-dozen lessons I tried, even though I consider myself a diligent person and spent years practicing many other things. I never improved my swing and the entire experience was nothing but frustration. If you have a rough time at a beginner or intermediate level, it's hard to gin up the desire for continued practice beating your head to a wall.
The premise of this paper is naturally enticing. If you had only tried a bit harder practicing lay ups in gym class, you could be just as good as Michael Jordan (ok more like you could get a bit closer, since they claim practice explains ~20% of results). I don't really buy it.