Just as the police aren't allowed to install a bugging device in the house of a suspect without judicial permission, they're not permitted to remotely surveil a suspect's phone without such permission either.
So your comparison of this limited additional capability to "allow police to enter anyone's home at any time" is not relevant. And trying to draw a parallel to "let the police shoot a fleeing suspect" is absurd.
But the NSA has been proven to be doing it without warrant, at will, and then lying to Congress and the American people about doing it, and then saying it was a good thing they did the thing they said they didn't do which was also illegal that they did.
That is a US intelligence agency, whose mission is by necessity shrouded in secrecy. They are not the French police, the work of whom typically will be presented in an open court for scrutiny.
So your comparison of this limited additional capability to "allow police to enter anyone's home at any time" is not relevant. And trying to draw a parallel to "let the police shoot a fleeing suspect" is absurd.