If you are a good commander you should never be in need of explaining why you killed each and every player.
Also, it's extremely excrutiating to be pressing through menus all the time (which by the way are bound on the same hotkeys as your weaponary, to give a result for every blatant thing).
Let me give you a good example.
You command a cageday and suddenly the prisoners start rebelling, the server is full and you've shot your full ak47 ammo out, but the terrorists keep on coming, you quickly need to switch to your deagle.. but no.. you cannot. Why you ask? You check the chat and you see yourself spamming: "Rawrplus" killed "Player X" for not following commands. "Rawrplus" killed "Player Y" for not following comamnds, realising when you were in dire need of equipping deagle, the menu popup queue has kept you from being able to save yourself, kill the rebellers and keep on commanding. Instead, now you're dead, you couldn't defend yourself and you didn't even give the prisoners you killed the correct reason, because you were focusing on picking a gun in self defense, not concentrating on a bloody sidemenu that's begging you to specify a stupid reason for why you killed a prisoner.