How do people start the Shadowforged key quest in HC?
“ Various quests and objectives that require the player to die to complete or initiate the quest or objective may now be completed without the player’s demise.
While these quests are iconic and flavorful, the requirements of the character to be in a state of death is obviously problematic on a Hardcore realm. As a result, we’ve designed new ways to complete these quests without requiring your character to die or be dead to complete them.”
From their HC rules of engagement post.
Check the PTR or that forum/development notes.
They may not have put the update in yet to be tested.
Rogue/engineer/blacksmith can all unlock the doors so it’s a moot point.
But Blizz will probably do something to make it accessible to all.