The debate over banning HUDs in online poker centers on fairness and game integrity. Supporters of a ban argue that HUDs create an unfair advantage by allowing experienced players to track and analyze opponents' tendencies in real time, discouraging casual players and reducing the game's accessibility. Opponents believe HUDs are simply tools that skilled players use to gain an edge, much like traditional note-taking, and that banning them would not eliminate data-driven strategies.