You're right.
In this picture, there are people who don't want to report, so we don't see those concussions coming up in the stats. We can kind of guess at that, and typically male athletes are going to be the ones who are not reporting as much.
At the same time, there are other factors too, as you were mentioning. If we're looking at the equipment and at the way people play the sport—there's something called the gladiator effect—if you're putting on so much equipment and it's getting harder and tougher and thicker or whatever, people—