Seems to me the law is intended to codify one of the four rules of gun safety, know whats behind your target.
I see it as an attempt to regulate what people can do on their own property. I live a mile down a private dirt road and my range is not visible from the dirt road. But nothing would stop a County Sheriff’s deputy from driving down that road one day while I’m out target shooting and deciding that I was “reckless” or “negligent” just because he was there, even though I couldn’t see him.