In Thursday’s episode of “Deep Waters” on ProBox TV, analyst Chris Algieri considers how boxing has changed over the years, and megafights such as Saturday’s undisputed heavyweight championship bout between Tyson Fury and Oleksandr Usyk hold back the sport. The politics of making these events, Algieri says, rather than the fight itself, kneecap boxing’s ability to shine a light on more than a handful of fighters and good fights, even as fans simply want the best to fight the best.