Hussar
Legend
From Here
So, whatcha think of this bit of advice?
My professional field is education, and one of the most maddening things for a student is when they feel that they have to play "guess what the teacher is thinking" when responding to a task, be it test, paper, homework, or whatever. What you are asking your players to do in this situation is the same thing, to come up with some strange and outlandish idea of how to open a door.
Why in the Seven Heavens would you expect your players to guess that opening a locked door could be accomplished by moving random pieces of furniture? The cliché of torch sconces and random books on bookshelves serving as door-opening triggers is a cliché that applies to hidden doorways, secret doors, sliding walls, rotating bookcases. In short, it applies to doors that you don't know (though you might suspect) are there. There is no apparent door, and the protagonist, quite by accident, happens to bump something that makes a door open. The mystery deepens as our hero ventures deeper into the heart of the haunted house or creepy castle. If you are hoping to use this example as evidence that your players are uncreative (because they didn't guess that a door could be opened with a random method such as manipulating a brazier or book or torch), I think that's a stretch.
So, whatcha think of this bit of advice?