I am not familiar with those characters, but to be clear I was talking about boxing the sport (not sure if those characters are boxers or not---I can't weigh in on those in particular). But my point was really more that pugilist brings to mind figures like Muhammad Ali and Jack Dempsey or Jack Johnson, and there isn't the same treatment of boxing the way other martial arts have been treated in movies and books. You will sometimes see it. For example there are Chinese martial arts movies that have brought in western boxers as part of a broader martial world. And you will occasionally see boxing used to punch out a guy with a gun or something in American movies. But there isn't the monks deep lore and cinematic language for the pugilist. Jack Dempsey's championship fighting doesn't unlock the power in movies and novels that the Nine Yang Manual does. It is like the other poster said, we have long associated it with sport more than adventure stories. That isn't a comment on any of these things in real life.
Also something about pugilist feels a lot more limited than the monk. The monk is drawing on internal energy, pressure points, spirituality not just punching things really well or hitting people with liver shots. You can layer those kinds of things on a boxer/pugilist. But I think the buy in is steeper for most players