A very important function for the scoreboard is also to be able to quickly identify suspicious player behaviors and their related scorings => Helping us to track down cheaters, highlight their soldier profile and from there have a direct access to reporting them with proof attached to the cheater report.
(and no, I am not claiming that just a high XP score or k/d rate is = cheating. Not at all).
But the scoreboard supports a group of players quickly to pinpoint out a certain player that may have been observed or reported to you by other players. And its the quickest way to use a scoreboard with all players to quickly run through on either team side to find the exact player name that maybe was just shared with you through a game audio chat.