My argument is that you can practice heading in much the same way you practice dribbling, shooting, and moving off the ball. I coach a high school team and we practice it regularly and it has helped my players improve. My argument is that Jozy is in a unique position to be a threat in multiple ways. Remember, he plays for Villareal AND the US national team (or will regularly soon). Not all crosses from Villareal (or the US team) will be played at the exact same height. When you add in corners and set plays i'm sure he'll have the chance to score with his head. Ignoring what could be a major part of his game is stupid. Practicing heading is not mutually exclusive to practicing all the other things which he can also excel at. I didn't say Villareal picked him because of this skill or that Villareal should make a particular change in tactics. He should work hard on the things that Villareal (and he does well). He should also work on heading because it could become an important part of his game.