> Criminals will be able to do all business and communication with 100% privacy from spying.
No.
Do you know how the police normally operate? There is a victim who comes to the police and says "these people committed a crime" and the police go investigate. They get a warrant based on the victim's testimony/evidence. They plant a bug in the suspect's home/office/car. They send undercover officers to infiltrate the organization. They interview witnesses and find other victims.
All of which can be done regardless of whether they can read your iPhone, which people didn't even have 15 years ago. And a video bug can capture you entering your PIN into your iPhone before they arrest you and confiscate it, so there is also that.