Taggers aside, small forwards are probably the most loathsome opposition players on the ground. Most of them have an inherent sneakiness that make them very good, and very difficult to umpire. Also, when they inevitably stage for free kicks (like many other AFL players) the consequence is often a goal.
Walters puts his head over the ball, tries to duck under tackles, and is quite slight so when he gets hit the impact looks quite severe. I wouldn’t say he exaggerates contact more than most players, but I wouldn’t say he plays through contact either. So, while that’s all above board, I understand how an opposition fan (or even an umpire) might think that he’s a ducker who plays for free kicks because at the end of the day those things look very similar.
I subjectively feel like Walters gets fewer free kicks than players like Puopolo and Toby Greene, but statistically he gets twice as many as those blokes. That’s a crude measure, and maybe he should be getting even more than he does, but he does get, relatively, a lot of free kicks.