With practice, anyone can better their left hook. In your opinion are the good ones born, or made with practice?
Your natural talent with any skill is somehow intertwinned with your DNA but I am a strong belliever that practice can make any one good at anything. Question is only how much practice you need and how good your teacher is. Of course, to be a great hook puncher, you will need it in your DNA and still put loads of practice hours in.