Yes, because criminals and pedophiles care deeply about following laws. They would never even think of using a piece of software if it was illegal, right?
It's mind-bending levels of absurdity. Surely nobody intends to (be able to) truly outlaw computers? That cat is out of the bag and people will build them or get their hands on them if they wish
The only possible outcome is that only honest citizens have their chats scanned and devices locked down. The latter has as side effect that Google, Apple, and Microsoft can do whatever the heck they want because open OSes are illegal now