That's the second time you've said the player didn't have a choice, and it's no more true now than it was the first time. The player both had and made a choice as to whether or not the character would engage in that situation; meaning all we're talking about here are the potential consequences of a choice that was already made.
Think about it - take this same rationale and apply it to other aspects of the game and see what it leads to. For example, if there's the potential of a deadly Ogre behind a door whose presence might cause one or more characters to become unplayable for a while (because they're dead!), I'd have to discuss it ahead of time with the player(s) and get clearance to put the Ogre there before the decision is made whether or not the character(s) would open said door.
Sorry, but no. The choice is simple: open the door or don't, but if you do decide to open it you have to accept whatever consequences (if any!) might follow.