Some positions are very difficult to analyze. Punter is one of those. As noted in my Corey Bojorquez analysis, punting stats are overall terrible. Most notably, it can be hard to separate the impact from the punter and their team in overall results.
Punting is also incredibly influenced by context. In 2020, Braden Mann had the highest volume of punts with 82. Bojorquez had half that with the Buffalo Bills. With such a small sample size for these players, coaching tendency is huge. A conservative coach who asks for just a few extra punts in opponent territory can create several short punts and/or touchbacks.