More people were killed by cows on the farm every year. 22 deaths per year
Still a horrible accident.
What makes it more news worthy is the video.

At the Gun Range over here my kids were allowed to shoot AR-15s.
The clip had 1 bullet. They were in a seated position and had the gun rest had side arms that would keep the gun from straying.

Any normal shooter knows the gun rises every bullet and she had not enough strength to hold it down.