You’re saying even if police/security had all that power, and they abused it, the public wouldn’t care.
I’m saying they absolutely would.
We sure cared about Rodney King, and that was the result of a video of a public event that occurred before a smartphone was in everyone’s pocket. You really think we don’t have the tools to watch the watchers today?
These agencies want encryption back doors, not elimination of encryption. Think about that for a minute. Think about it for an hour.
What if there was no encryption at all? What if there was a decentralized blockchain of hashes or whatever that resulted from “Johnny in Tucson AZ visited the New York Times at 11:41PM EDT on January 21, 2019”? Reconstruction of any other event wouldn’t match.