Archers were strategic weapons, not the main crux of killilng. They were used to do things like keeping an enemy division pinned down so that your cavalry can move around them or one of your own divisions can reach a more advantageous position. A well placed concentrated barrage could force an enemy to move in a direction that is more advantageous to you, etc…

They weren’t the primary means of killing people. They were the means of steering the battle where the general wanted it to go.