I don't buy the safety reasons excuse. Maybe after the night is over and we have a cease fire we can pick up our brass. Or no one go forward of the firing line to get brass that went forward. I'm fine with that.
Is the issue with kneeling? Touching the ground? Bending over? Touching hot brass and getting burned?
I think he just wants the brass for his own reloading.
"If Jesus had a gun he would be alive today"-Homer Simpson