Because Tesla Clown-in-Chief asked if humans could drive with just visual input, why can't a Tesla? C-in-C conveniently ignored that, to begin with, humans have binocular vision, and his cars had none. Also conveniently ignored were the facts that human eyes have immense dynamic range, are self-cleaning, and can move to track objects of interest. On top of this, humans also have hearing, which helps gauge danger. Many of these things could be filled in by Lidar but since C-in-C apparently had a revelation from heaven, possibly caused by drugs, lidar had to go.

They never used LiDAR. They removed the radar.