I've done CE 11 times (haven't had time this week) and I think I've only skipped the death singer four times. Once was a team mate who had the Crota cp first week so we skipped. The rest were groups that only wanted to run past the bridge CP so I just joined up at Crota. Yes people should know the fight because it's easy but it's no different than people skipping to the oracles on VoG