It’s not your job to reject yourself, other people don’t need your help. Your job is to think through how to most effectively communicate and demonstrate your competency.
You can spend time thinking about why you might get turned down, but it should only be in the context of honing your approach.
You’re too smart and resourceful to concern yourself with whether or not a door is locked, your focus should be on where to apply your heel on said door after getting a running start…