Part of the point is the fact that the judiciary is being captured by right-wing nutjobs. Getting a warrant from a militant judge is not difficult, and if the system is rotten all the way to the Supreme Court, there will be no recourse.
Also, to get a law, you need to get it past the senate, which is also captured by right-wing nutjobs.
> Especially since law enforcement can still get the location data from cell phone providers.
Yes, that is another problem. And considering that the carriers are in bed with the right-wing nutjobs, good luck with solving it.