> As an illustration, if we get reasonable evidence suggesting that someone is growing marijuana in their ranch, we can get a warrant and go inside. There's not too much the owner can do to stop it. However a perfectly encrypted iphone cannot be broken into, no matter if the entire world agrees that there's evidence of crime in it.

Is that a terrible thing? It's not like they are hiding guns in their iphone. While there could be evidence in there, at some point there is physical evidence in the real world. Just making it easier to convict them is not a solid argument for weakening protections for everyone.