Yet. Once it's on the device, it's a MUCH smaller step to use it in other ways. It's certainly easier fro governments to argue that they should be able to force it to be used arbitrarily... you know, for the children/terrorists/etc.
> And it's important to note the threshold and manual human review system put in place before the authorities receive any notification at all.
Until it's not. Once again, once it's in place, it's a lot easier for malevolent actors (governments) to force it to be used other ways.
This a back door. Plain and simple. The fact that it's not _currently_ going to be used for evil (depending on your definition of evil) does not mean it won't be in the near future. Back doors are bad. How many times does this need to be said?