Your analogy is severely flawed as my door lock is under my control and I know about the risks (i.e it is unlocked) so I can take the steps I need to mitigate that risk

For your analogy to apply here it would be the manufacturer of the door lock having a master key stolen then not telling anyone about it until they have a new lock for you to buy from them, in the case of a lock I would want to know that the lock is useless even if there was not solution so I can mitigate the risk no simply continue locking it believing it to be secure