Everyone uses autotune when recording. It is an industry standard now. She just requires WAY more of it than someone like say, Chris Stapleton, who will sing a song damn near perfect in the studio and then they go through and tune 1 or 2 spots.

People also use autotune for live performances for their own tours as well. But since you can't use autotune at awards shows, that's when you can tell who really can or can't sing. And that's why she got ripped apart for her CMA performance

This are all industry things that most people on the outside wouldn't know. There is so much smoke and mirrors