These are what we call the 'YMMV items.' Things that some people find in this work. We call them 'your mileage might vary' because not everyone sees these things in the same way. This starts discussions in the trope lists, a thing we don't want. Please use the discussion page if you'd like to discuss any of these items.
Alternate Character Interpretation: There supposedly exists a poem version of the story where Bluebeard is a regular man, the bride is very selfish, and the room is merely an empty room for Bluebeard to gather his thoughts. The bride, not being able to bear the thought of her husband keeping secrets from her, opens the room, and when Bluebeard finds out, he merely divorces her.
This is almost certainly referring to the Edna St. Vincent Millay sonnet "Bluebeard" (here).
There is also an absolutely hilarious Soviet cartoon called "The Very Blue Beard" in which the Bluebeard gets to tell his own side of the story to a detective. One wife was fashion obsessed, the other health obsessed, the third believed in an open relationship - well, sorry, love, that's the way it turned out.