Its like "Heads" v "Bullets". They were bullet heads when I was a kid. I know they are bullets and if anyone referred to them as a "Head", I know what they mean so why get stressed out about it?
If folk seriously think that they might "Mistake" a bullet for a case head as regards the reloading process then either "folk" or the "Miscreant" probably should not be out and about without a carer, let alone messing with hand loading.
THIS was one reason given, but generally it is just pedantics with bugger all better to do than find something that offends them