Let's imagine they succeed. So all strong encryption will need to have the keys stored "safely" somewhere. Perhaps at some government-controlled server, because

Let's imagine they succeed. So all strong encryption will need to have the keys stored "safely" somewhere. Perhaps at some government-controlled server, because we all know they are super secure. So, what happens once the keys eventually leak? When nation states AND terrorist organizations get the keys to unlock everyone's encryption? If "think of terrorists" is the rhetoric here, what happens when THEY have access to our devices?