this kinda makes sense. I'm more of a cs player, so hopefully my observations aren't totally off base. generally, a group of five humans will have some sense of who their best player is, who their worst player is, and who's good at specific roles. for instance, you might deliberately send your worst player into a bombsite first to gain info about the opponent's defense (and save your best player to react to that info). or you might send the person who's best at "entry fragging".

an egalitarian playstyle doesn't make sense when you have human players with different capabilities. you want to play to each person's strengths. if you have an algorithm controlling five heroes (or five instances of the same algorithm, idk how it works), there's no "best player" to send more resources to or dedicate to a specific role. I don't know enough about moba to say whether this is even an advantage.

none of this stuff is particularly interesting in counterstrike. a circa 1999 aimbot with a good ping will beat any human player.