IT isn’t the getting the warrant, it’s giving them the ability to spy WITHOUT a warrant - which Snowden revealed - that’s the problem.
“More than anything, though, the members of Congress expressed anger that the FBI director didn’t follow through earlier on his stated intention to engage in a debate in Congress and the public about the proper role for encryption in society. Instead, he decided to circumvent that debate altogether and quietly go to court to get a judge to do what the legislative branch has so far refused to do. [referring to the writ, not the warrant]”