If you are referring to something like this
https://www.youtube.com/watch?v=hAnq2uMbFbE
I can see your point. But the incident occurred in a pay for play for profit range which from the various posting in the thread had issues with ricochets and shooters unable to keep their rounds on the berm. It also seems from reading the thread the range widely lacked supervision and was very busy. The very fact they constructed the wooden barriers on top of the berms is clear evidence the range owners were aware of the dangers.
I have spent most of my life in places where there were wide open areas with good backstops and no other people. The small amount of indoor range time I have enjoyed were either at sanctioned matches with RSO's or there was no one else on the range.
It is my choice is to avoid crowds and circumstances where something i don't wish to shoot is in front of my muzzle. YMMV and probably does. Is it possible we can both be right?