This has been demonized as much as anything, but possibly “over the top.”
Which is ironic because the lack of a slide is often involved in creating an OTT…along with a backswing that is too far inside.
The hips must move laterally to initiate the down swing. It’s what starts the weight shift and keeps you from snatching the club with the hands.
The slide never causes any of the problems it is blamed for. It is right there with “keep your head down” as one of those cliches that is blamed for everything by golfers who don’t really know what is causing the problems. A kind of catch all.
Often, the real core issue that is causing all of the problems the slide is blamed for is a loss of connection between the left arm and left side coming into impact…but there are many reasons and issues the slide gets the bad rap for.
Any time you hear someone blame bad shots on a slide, you can pretty much questions their political and religious beliefs as well.