That makes perfect sense. I'm no lawyer and am only discussing this out of idle curiosity, so I'm sure my comments were a naive take. The situation I'm envisioning is an audio recording from a 2-party consent state outlining the existence of evidence. Since that cannot be the legal basis of a warrant, an officer might wander through the neighborhood talking with associated citizens to try and independently establish the need for a warrant based on various witness statements. No evidence has been falsified or created out of thin air, and there's no hope of a conviction if the suspected building doesn't contain damning evidence.

However, I fully recognize how such a process might be abused and the need for a very firm legal hand to avoid accidentally becoming an authoritarian state.