I completely agree that they are supposed to be challenging. However my definition of a challenge isn't an immediate team wipe because one person could've made a simple mistake. A challenge to me is completing an area or boss fight that still requirs mechanics to be completed but managing to do succeed with only 4 or 5 people. Like the Gatekeeper section in VoG. I remember many times from Vanilla Destiny, losing a couple people and still managing to get the relics and defend the conflux successfully. Or managing to kill Crota even though we lost some people from the Ogres back during TDB days. My idea of challenge is not having a forced wipe because a guy accidentally backed up to far on his plate and caused the platforms to disappear even though we only needed one more round of bombs. The way Bungie designed King's Fall makes it demand perfection from the players on the mechanics and yet the boss fight's designs and mechanics aren't even close to being what they demand from the players. It's flawed and full of artificial difficulty.